The Peg Perego YPSI and Nuna Demi Grow are both convertible strollers that can start as single strollers and later convert to hold two children in seats or a combination of seat, car seat, or bassinet! They are also great options for twins as both can hold two seats, two car seats, or two bassinets.
The Peg Perego YPSI is newer as it only debuted in 2019 and gained a second seat option in 2020. But its manufacturer isn't new to the stroller game: Peg Perego is an Italian maker of baby gear since 1949. The YPSI is also one of the lightest strollers that convert to a double, weighing in at only 22.6 pounds as a single.
The Nuna Demi Grow is Nuna’s only double stroller, and is unique in how the seats are arranged. Instead of the stadium or tandem seat option often seen (like on the YPSI), the Demi Grow has stacked seats. This configuration makes the stroller easier to steer and less long when in double mode!
Peg Perego YPSI
The Peg Perego YPSI is among the lightest and most affordable convertible strollers on the market. Just add a set of adapters to the YPSI’s 22-pound frame, and your stroller instantly becomes a double when you add an infant car seat or bassinet for your newborn.
All-wheel suspension, a standing fold and a height-adjustable canopy are among the features that make the YPSI easy to use and maneuver.
Made in Italy by Peg Perego, the YPSI offers a two year warranty with a one year extension if registered within three months of purchase. Peg Perego introduced a second seat for the YPSI in 2020, although the stroller itself did not change.
Nuna Demi Grow
The Demi Grow is Nuna's first stroller that can accommodate a second seat for siblings or twins. The Demi Grow offers a sleek design, 2-year warranty, sturdy all-terrain wheels with adjustable suspension, and compatibility with the Nuna PIPA series of infant car seats considered to be among the safest on the market.
The Demi Grow includes a zip-out seat lining for an all-weather mesh seat and custom dual suspension that changes the ride for smooth and rough surfaces. A magnetic buckle makes it even easier to help your child in and out of the stroller, while brown leatherette detailing on the handle and bumper bar add a contemporary look.
In 2022, Nuna added a new feature not seen on their strollers before - a built in mosquito net! With the included Aire Protect canopy, a spare canopy included in addition to the original Classic canopy, parents can choose to add more ventilation and protection from bugs and sun with the Aire Protect canopy or go for full coverage with the Classic canopy.
Peg Perego YPSI vs. Nuna Demi Grow Stroller Price
For current pricing, please see the respective product pages.
The purchase of the Peg Perego YPSI stroller includes:
- YPSI stroller with seat and chassis
- Adapters for Peg Perego infant car seat manufactured in January 2018 or later
The purchase of the Peg Perego YPSI Double stroller includes:
- Peg Perego YPSI stroller with seat and chassis
- Links (car seat adapters) for Peg Perego infant car seat manufactured in Jan. 2018 or later
- YPSI Companion Seat
- Douple adapter set (upper and lower adapters)
The purchase of the Nuna Demi Grow stroller includes:
- Nuna Demi Grow stroller with one seat
- Classic canopy
- Aire Protect canopy
- Ring car seat adapter
- Set of traditional car seat adapters
- Rain cover
The purchase of the Nuna Demi Grow Double stroller includes:
- Nuna Demi Grow stroller with two seats (primary seat and sibling seat)
- 2 Classic canopies
- 1 Aire Protect canopy
- Ring car seat adapter
- Set of traditional car seat adapters
- Rain cover (2)
Peg Perego YPSI vs. Nuna Demi Grow Weight and Dimensions
The Peg Perego YPSI is the lightest stroller on the market that converts from single to double, weighing 4.8 pounds less than the Nuna Demi Grow as a single. It's also 4 inches narrower, helping to navigate tight spaces. The Demi Grow may be better for taller parents though as the handlebar comes up 3.25 inches higher than the YPSI.
When configured as a double stroller with two seats, the YPSI is still about 4 pounds less than the Demi Grow Double. The YPSI is also smaller when folded.
Single Stroller Weight
- YPSI: 22.6 pounds
- Demi Grow: 27.4 pounds
Double Stroller Weight
- YPSI: 31.5 pounds
- Demi Grow: 35.4 pounds
Single Stroller Open Dimensions
- YPSI: 39.25"L x 20"W x 40.25”H
- Demi Grow: 39.5”L x 24”W x 43.5”H
Single Stroller Folded Dimensions
- YPSI: 15.25"L x 20"W x 32.25"H
- Demi Grow: 23.5”L x 24”W x 35”H
- YPSI: 7.2” front wheels; 10.5” rear wheels
- Demi Grow: 7” front tires; 11” rear tires
Peg Perego YPSI vs. Nuna Demi Grow Weight Limit
Both the YPSI and Demi Grow have two identical seats when you turn them into doubles. Your children can sit in whichever seat they prefer as long as they are within the 50 pound weight capacity of ether seat. This is unique, as many double strollers have two different sized seats with different weight capacities.
- YPSI: 50 pounds per seat
- Demi Grow: 50 pounds per seat
Seat Back Height
- YPSI: 18”
- Demi Grow: 18.5"
Seat to Canopy Height
- YPSI: 22"
- Demi Grow: 20.5"
- YPSI: 12"
- Demi Grow: 10.5" with wider insert and 12" without insert in
- YPSI: 9”
- Demi Grow: 10.5"
Calf Support Length
- YPSI: 11” - stationary and does not adjust like the Demi Grow
- Demi Grow: 9.5"
Peg Perego YPSI vs. Nuna Demi Grow Warranty
• Peg Perego YPSI: 2 years
• Nuna Demi Grow: 2 years
Peg Perego YPSI vs. Nuna Demi Grow Double Stroller Configurations
Both the YPSI and Demi Grow can expand from a single to a double stroller and can accommodate any combination of 1-2 stroller seats, bassinets, or infant car seats. The YPSI can actually accommodate up to 3 children with an optional ride along board for an older child to stand on.
On the YPSI, the second seat attaches to the lower portion of the frame - stadium style. On the Nuna Demi Grow, the second seat attaches to connectors in the back of the basket so that the seat is positioned behind and beneath the primary seat - stacked style.
Both designs offer pros and cons.
The advantage of the YPSI Double is that the basket space is not impacted with the addition of the second seat. However, the advantage of the Nuna Demi Grow Double is that the weight of both children is placed on the strongest part of the stroller, the rear axle, making it easier to push and steer than the longer YPSI Double.
The downsides of the Demi Grow design: The child essentially rides inside the stroller basket, which limits their view and movement—as well as your storage options. The second seat for the Demi Grow is also more difficult to access for the parent (although your child might think it's fun to climb in).
Both strollers offer numerous configurations for siblings or twins: You can add a second stroller seat, car seat or bassinet to either stroller.
Adapters are needed to convert the YPSI from a single to double. The YPSI adapters are packaged together as a set of double adapters.
The YPSI double adapters—both upper and lower—are needed at all times in double mode, regardless of the configuration. The upper adapters can only be attached and removed when the stroller is folded, while the lower adapters snap onto the frame. The stroller can fold with upper and lower adapters attached.
No adapters are needed for the Demi Grow stroller seats. The stroller has built in adapters for both stroller seats and can be used from a double out of the box with one infant car seat or bassinet and one stroller seat.
Another difference: The YPSI can be a ride for three kids when you attach the Ride With Me Board to the stroller. Nuna does not make a ride-along board, although third-party brands may fit.
Peg Perego YPSI Configurations
Nuna Demi Grow Configurations
Peg Perego YPSI vs. Nuna Demi Grow Bassinet
A bassinet is the coziest way for your baby to begin strolling: It allows your infant to lie flat, which is safest for her head and neck, and provides more airflow than a car seat.
Your purchase of the Demi Grow Bassinet, sold separately, includes a stand, which can be used in your home or by your bedside as baby's first crib. The Demi Grow Bassinet features a Sky Drape magnetic cover, additional ventilation panels integrated into siding near your baby's head for customized comfort, whatever the season, and non-slip feet for added security and fabric protection.
The Peg Perego YPSI bassinet, sold separately, includes ventilation inserts, a window and an extended apron that provides protection from the elements. Add the Peg Perego bassinet stand to bring baby to your bedside, keeping essentials in a basket underneath.
Peg Perego YPSI vs. Nuna Demi Grow Fold
For both strollers (and most doubles), you'll need to remove the lower/bottom seat before folding.
How to Fold the Peg Perego YPSI
To fold the YPSI, first press the triggers on both sides of the top seat, then flip the seat over onto itself. Then, find the gray switch on the bar in the middle of the frame and pull it. The stroller will then fold in half. For the most compact fold, remove the YPSI seat before folding the stroller, then remove the upper adapters (which can only be detached when the stroller is folded).
How to Fold the Nuna Demi Grow
While the Nuna Demi Grow can be folded with one seat attached, it's best to remove the seat before folding to ensure access to a convenient, leather-wrapped carry handle integrated into the frame.
To fold the Demi Grow, lock the stroller, remove the seats, and pull up on the triggers (on the sides by the handlebars) to fold it down. The Demi Grow is self standing and has a convenient carry handle to lift it.
See the Nuna Demi Grow fold demonstrated in this video at minute mark 2:41.
Car Seats Compatible with Peg Perego YPSI vs. Nuna Demi Grow
The Peg Perego YPSI is compatible with infant car seats from Peg Perego as well as several other brands, allowing families to create a convenient travel system. You can attach a Peg Perego infant car seat directly to the stroller using adapters (which Peg Perego calls "links") that are included with purchase of the stroller.
Nuna is well-known for their Nuna PIPA model car seats. The Nuna Demi Grow is compatible with the Nuna PIPA series car seats, and the necessary car seat adapters are included with your stroller purchase. The Demi Grow comes with two sets of adapters - one ring adapter, and one set of post adapters. No other brand car seat will work with the Demi Grow.
Peg Perego YPSI vs. Nuna Demi Grow Colors
For current colors of the Peg Perego YPSI, click here.
Nuna products meet the standards for GREENGUARD GOLD certification. This means that they have been thoroughly tested and certified to meet stringent emissions standards for over 360 volatile organic compounds (VOCs) and chemical emissions.
For current colors of the Demi Grow, click here.
Peg Perego YPSI vs. Nuna Demi Grow Accessories
Sometimes convenient accessories makes or breaks it for the parents! The Peg Perego YPSI offers more accessories than the Nuna Demi Grow including a snack tray and a ride-along board for an older toddler.
Peg Perego accessories sold separately for the YPSI include:
- Travel bag
- Universal cup holder
- Ride-along board
- Bassinet stand
- Baby stage pad (infant insert)
- Rain cover
- Mosquito net
- Bassinet mattress cover
- Snack tray
The Demi Grow comes with a classic canopy, an aire protect canopy, ring car seat adapter, traditional car seat adapters, fenders, and a rain cover. Other Demi Grow accessories sold separately include:
- Bassinet and stand
- Parent cup holder
- Travel bag
- Sling bag
Peg Perego YPSI vs. Nuna Demi Grow Pros and Cons
Peg Perego YPSI
- YPSI is the lightest convertible stroller on the market
- Less expensive than the Demi Grow
- Just 20” wide - 4” less wide than the Demi Grown - making maneuvering thru crowded places easier
- More accessories offered such as a snack tray and sibling ride along board
- Smaller when folded
- Requires double adapters (on both upper and lower positions) for all double configurations
- Stroller has to be folded in order to attach and remove upper adapters
- Footrest does not adjust to multiple positions (although seat fabric pops out to elevate seat)
Nuna Demi Grow
- Stacked design of double stroller offers improved maneuverability and a reduced length
- Seat includes insert that can be unzipped for a mesh seatback
- Spare Aire Protect canopy has built in bug cover and more mesh windows
- Sky Drape cover extends from the canopy for full sun coverage over the seat
- Does not require additional adapters to convert to double stroller
- Harness buckle is magnetic, making it easier to help your child in and out
- Basket space is minimized when child is riding in lower position
- Some toddlers may not like riding underneath the upper seat
- Seat in lower position is not reversible and can only face forward
- Stroller is larger and heavier than the YPSI
- Not compatible with car seats other than Nuna brand
- Does not have a ride-along option for a third child
- More expensive than the YPSI
Strolleria is a family-owned and operated retailer dedicated to making the baby gear buying experience less overwhelming for parents. If you have questions about the Peg Perego YPSI or Nuna Demi Grow feel free to contact us by starting a live chat, calling us at 480-442-9433 or e-mailing email@example.com.