by Amy Venzke June 07, 2019 9 min read

What are the differences between the Nuna Demi Grow and the Nuna MIXX strollers? The shortest answer is simple: While the MIXX is a single stroller, the Demi Grow expands alongside your family, accommodating two kids with an addition of a second seat. 

But that doesn’t mean the choice between the two strollers is an easy one.

When you’re expecting your first child, it’s hard to decide when—or if—you’ll be adding a second. And even if you’re certain your family will someday include two kids, no one can quite predict whether both will be stroller-aged or have enough of an age gap that a double stroller isn’t necessary.

And expansion options aside, the Nuna Demi Grow and MIXX share many great features, like sturdy wheels and all-wheel suspension for any terrain, a reversible seat with a ventilated seatback, an ample sun canopy, and easy one-click compatibility with Nuna’s best-selling line of safe yet stylish infant car seats.

We’ll explain the differences, benefits and drawbacks between the two models in this Nuna Demi Grow vs. Nuna MIXX comparison. 

Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

Nuna Demi Grow

The Demi Grow is Nuna’s only stroller that can be converted into a ride for two. When your second child comes along, add another seat, car seat or bassinet for an instant double stroller.

Because the Demi Grow made its debut in 2018, Nuna is not changing the stroller for 2019.

Nuna MIXX

A best-seller for many years, the Nuna MIXX is a versatile single stroller that’s compact and easy to use, yet durable enough for any type of terrain.

The 2019 MIXX features new colors and a redesigned seat with a ventilated seat back and no re-thread harness. Learn more about the two models in this 2019 vs. 2018 Nuna MIXX comparison.

Nuna Demi Grow vs. Nuna MIXX Price

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As a more robust stroller that can expand into a double, the Nuna Demi Grow is priced $150 higher than the single Nuna MIXX.

Both the Demi Grow and MIXX come with the stroller seat and chassis and a ring car seat adapter. The Demi Grow also includes a second set of post-style car seat adapters.

Here are the prices for each model:

  • Nuna Demi Grow: $799.95
  • 2019 Nuna MIXX: $649.95

Is the expansion option on the Demi Grow worth the extra $150? If you plan to need a double stroller in the future, choosing a convertible option like the Nuna Demi Grow would likely represent a large cost savings over adding a second stroller later (double strollers can cost $400 to $2,000.) 

Once baby #2 is on the way, you can spend $199.95 for a Demi Grow sibling seat—or to start off, simply pair your existing seat with a car seat on the upper or lower position of the stroller. 

Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

Nuna Demi Grow vs. Nuna MIXX Weight and Dimensions

The Demi Grow is a larger, sturdier stroller than the MIXX, considering it can support the weight of two kids up to a total of 100 pounds. The seat of the Demi Grow is also slightly longer and slightly higher from the ground, helping to accommodate taller parents and kids.

The MIXX is about 3 pounds lighter and 6 inches shorter than the Demi Grow, making the stroller more compact when in use or when folded in the trunk of your car.

Stroller Weight

When configured as a single stroller, the Demi Grow is about 3 pounds heavier than the MIXX. Note that Nuna, like other manufacturers, sometimes weighs its products without the use of items like the canopy or seat insert. The figures below reflect the weight of each stroller with all included pieces.

  • MIXX: 29 pounds
  • Demi Grow: 32 pounds

Weight Capacity

  • MIXX: 50 pounds
  • Demi Grow: 50 pounds per seat 

Dimensions

The Nuna MIXX is more compact than the Demi Grow, with a reduced length of about 6 inches.

  • MIXX: 33.5"L x 23.4"W x 44.3"H
  • Demi Grow: 39.5"L x 24"W x 43.5"H

Folded Dimensions

The MIXX and Demi Grow differ in their folded dimensions in part because they fold in two different ways: The MIXX folds in half, low to the ground, while the Demi Grow stands when folded. Overall, the MIXX offers a smaller footprint when folded.

  • MIXX: 34"L x 23.5"W x 18"H
  • Demi Grow: 23.5"L x 24"W x 35"H

      Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

      Nuna Demi Grow vs. Nuna MIXX Seat and Canopy

      The seats of the Demi Grow and MIXX share similarities, like a ventilated seatback, as well as differences, like their recline and sun coverage. The seat of the Demi Grow is also slightly taller and longer than the seat on the MIXX.

      Canopy

      Both models have the most generous sun coverage you'll find on a stroller, though in different ways. The MIXX canopy can be unzipped for complete coverage, while the Demi Grow has a "Dream Drape," similar to the covers seen on the Nuna PIPA car seats. 

      Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

      Seat Back

      Both Nuna strollers offer unique features to help keep your child cool and comfortable in warm weather. On both models, an insert can be removed from the seat to reveal a mesh back, helping to add airflow and prevent sweaty backs.

      Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

       

      Seat Size

      The length of the Demi Grow seat is 2" longer than the MIXX, offering a bit more space for an older child to stretch his legs.

      • MIXX: 19" from seat to canopy, 17" from seat to footrest
      • Demi Grow: 19" from seat to canopy, 19" from seat to footrest

      Seat Height

      The Demi Grow is a favorite among tall parents because its seat is higher than most strollers, bringing baby closer to you. Measuring from floor to seat, the Demi Grow is 4" higher than the MIXX.

      • MIXX: 22" from floor to seat
      • Demi Grow: 26" from floor to seat

      Seat Recline

      Only the seat of the Nuna MIXX offers a completely flat recline. The Demi Grow seat is newborn-safe but not fully flat, meaning the child's legs will be elevated when the seat is in its most-reclined position.

      Nuna Demi Grow vs. Nuna MIXX Configurations

      Both the Nuna Demi Grow and Nuna MIXX can be paired with a car seat or bassinet, and both feature a reversible stroller seat that can face you or face forward.

      See the configurations of the MIXX below. 

      The Demi Grow is the only Nuna stroller that can expand into a double, making it Nuna’s most versatile option.

      As a double stroller, the Demi Grow features a different design than most on the market. Instead of one seat in front of the other, as seen on tandem strollers like the UPPAbaby VISTA, the Demi Grow seats are stacked one over the other. (See our Nuna Demi Grow vs. UPPAbaby VISTA comparison here). 

      The stacked seats make the Demi Grow shorter and more maneuverable than other tandem double strollers, as the front wheels can move more freely without the weight of a child on top of them. It also allows the Demi Grow seats to be interchangeable between the upper and lower positions, whereas other strollers have a second seat that’s smaller than the primary seat.

      The downside? The Demi Grow has limited storage basket space when a second child sits in the lower position. However, parents of a newborn and a 3-year-old, for example, may not find that they always use the Demi Grow as a double stroller. Rather, making the stroller a double is an option for long walks and trips to the zoo.

      See the photo below for a look at how the Demi Grow can be used with up to two stroller seats, car seats or bassinets. While the upper seat can face either direction, the lower seat will always face forward, resting inside the basket space.

      Nuna Demi Grow vs. Nuna MIXX Colors

      With Nuna’s neutral-yet-fashionable color palette extending across its line of strollers, car seats, playards and more, the available colors for the Demi Grow and MIXX are similar but not the same.

      Additionally, the Demi Grow features a black leatherette handlebar and bumper bar, while the leatherette details for most of the 2019 MIXX colors is a saddle brown.

      The Demi Grow is available in these colors:

      • Aspen
      • Caviar
      • Frost

      Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

      The 2019 Nuna MIXX is offered in these colors:

      Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

        Nuna Demi Grow vs. Nuna MIXX Bassinet

        The bassinets sold separately for both the Nuna Demi Grow and the Nuna MIXX are similar in design and can be used for overnight sleeping.

        While Nuna offers the Demi Grow bassinet in three colors that match the stroller, the MIXX bassinet is only available in Caviar Black.

        However, Nuna makes an accessory for the MIXX bassinet that isn’t available for the Demi Grow version: the MIXX stand, which elevates the bassinet to your bedside and offers a lower storage area for diapers or other essentials. The MIXX stand can also be paired with the stroller seat to create a convenient on-the-go high chair. 

        Bassinets are designed specifically for each stroller model, so the MIXX bassinet does not fit the Demi Grow, and vice versa. The Demi Grow bassinet also does not fit the MIXX stand. 

        Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

        Nuna Demi Grow vs. Nuna MIXX Fold

        The Nuna Demi Grow and MIXX each offer a simple fold, but in different ways.

        The MIXX closes like a clamshell, allowing the stroller to be trolleyed, suitcase-style, when folded. When folded, the more compact MIXX will take up less trunk space than the Demi Grow. 

        However, the Demi Grow stands when folded, sparing parents of having to bend to the floor to pick up the stroller. The stroller also includes a leatherette-wrapped carry handle integrated into the frame, which creates a more natural carrying position.

        Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

        Car Seats Compatible with Nuna Demi Grow and Nuna MIXX

        Both the Nuna Demi Grow and Nuna MIXX are compatible with Nuna’s PIPA series of car seats. See this Nuna PIPA vs. PIPA Lite vs. PIPA Lite LX comparison to review the differences between the three models.

        All three car seats instantly click into the ring adapter, which is included with purchase of the Demi Grow and the 2019 MIXX.

        The ring adapter is designed only for Nuna car seats, so car seats from other brands will not fit the MIXX or Demi Grow. 

        Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

        Benefits and Drawbacks 

        So which is better: the Nuna Demi Grow or the Nuna MIXX? Only you can decide which stroller is best for your family, but here are the benefits and drawbacks we see.

        Nuna Demi Grow

        Benefits

        • Can grow with your family, becoming a double stroller with the addition of a car seat, bassinet or second stroller seat
        • Stands when folded and includes integrated leatherette-wrapped carry handle for easier lifting
        • Higher-sitting seat is 4" closer to parent, compared with MIXX
        • Seat offers an additional 2" of leg room compared with MIXX

        Drawbacks

        • Costs $150 more than MIXX
        • Weighs 3 pounds more and is 6" longer than MIXX
        • Seat does not offer fully-flat recline (legs will remain elevated)
        • Lacks available accessories, like cup holder, snack tray, bassinet stand and rain cover

        Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

        Nuna MIXX

        Benefits

        • Offers similar maneuverability and features of the Demi Grow but costs $150 less
        • Stroller is 3 pounds lighter and 6" shorter than Demi Grow, taking up less trunk space
        • Can be trolleyed when folded 
        • Stroller folds with seat facing either direction, while Demi Grow seat must be forward-facing
        • Fully-flat seat is more comfortable for newborns and naps
        • Has more available accessories than Demi Grow, including cup holder, snack tray, bassinet stand and rain cover 

        Drawbacks

        • Cannot be expanded into a double stroller for the future
        • Does not stand when folded, making the stroller more awkward to pick up or carry
        • Bassinet is only available in one color

        Nuna Demi Grow vs. Nuna MIXX Stroller Comparison

        Conclusion

        Which stroller is better: the Nuna Demi Grow or the Nuna MIXX? The answer would be different for every family.

        The Demi Grow is heavier and more expensive, but it may spare you from having to buy an additional double stroller later if you’re planning to have at least two kids. Plus, in contrast to a designated double stroller, a convertible option like the Demi Grow also allows you to reduce your stroller to a single once your oldest is a full-time walker. 

        If you’re too busy thinking about your first child to worry about your second, the smaller and less expensive Nuna MIXX is a best-seller with most of the features families are looking for in a stroller.

        With either option, you’re choosing a high-quality, versatile and stylish stroller that will be a great companion for many strolls to come.

        Questions?

        Strolleria is a family-owned and operated retailer dedicated to making the baby gear buying experience less overwhelming for parents. We also offer free shipping and no sales tax outside of Arizona!

        If you have more questions about the Nuna Demi Grow vs. Nuna MIXX debate, feel free to contact us at 480-442-9433 or customercare@strolleria.com.

          Amy Venzke
          Amy Venzke

          Amy Venzke is the co-owner of Strolleria, along with her husband, Drew. Together, they have a mission to make the gear-buying experience easier on parents. That includes you! Feel free to contact her with questions at amy@strolleria.com.