Both are booster car seats — here are their published manufacturer specs side by side.
This compares published manufacturer specs — not safety or fit advice. The seat's manual, your vehicle's manual, NHTSA's tools and a certified CPST are the fit-and-safety authority; always check them before installing.
Spec
mifold Grab-and-Go
Nuna AACE
Stage
Booster
Booster
Narrow (3-across)
✓
–
Extended rear-facing
–
–
FAA-approved
–
–
Lightweight / travel
✓
–
How they differ
the mifold Grab-and-Go is listed narrow (roughly ≤17″) for fitting three across a back seat; the Nuna AACE isn't listed narrow
the mifold Grab-and-Go is the lighter, more travel-friendly model
Published limits
Mode
mifold Grab-and-Go
Nuna AACE
Booster (with back)
—
40–110 lb · 38–60 in · 4+ yrs
Booster (backless)
40–100 lb · 40–59 in
50–120 lb · 38–60 in · 5+ yrs
Useful life
7 yrs from manufacture
10 yrs from manufacture
mifold Grab-and-Go: Backless booster, lap-and-shoulder belt only, age 4+. From the US manual for model MF12-US (the US version of the mifold grab-and-go): 40–100 lb and 40–59″. Discontinue use 7 years after the manufacture date printed on the Shoulder Belt Guide Adjustment Clip.
Nuna AACE: Belt-positioning booster convertible between high-back and backless mode — the two modes have genuinely different weight floors and minimum ages (high-back: 40 lb / 4y+; backless: 50 lb / 5y+), same height range for both. Do not use if more than 10 years old (printed number, per manual).
That is the record of the brand — not a verdict on these models. A recall names specific models and manufacture-date ranges, and a seat missing from the record is not "recall-free": check nhtsa.gov/recalls with the model and date of manufacture on your seat's label. Source: NHTSA, retrieved 2026-09-05.
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FAQ
What's the difference between the mifold Grab-and-Go and the Nuna AACE? The mifold Grab-and-Go is narrow for 3-across, lightweight/travel; the Nuna AACE lists none of the narrow / extended-rear-facing / FAA / lightweight flags. Both are booster car seats.
Which fits three across, the mifold Grab-and-Go or the Nuna AACE? The mifold Grab-and-Go is listed narrow (~≤17″) for 3-across; the Nuna AACE isn't. Three-across fit still depends on your exact vehicle — confirm before buying.
Which is right for my car and child, the mifold Grab-and-Go or the Nuna AACE? That depends on your specific vehicle and child — this page compares published manufacturer specs only, not fit or safety. Check the seat manual, your vehicle manual, NHTSA's car-seat finder and ideally a certified CPST before deciding.
Citing these specs? Go ahead — published manufacturer data, last verified 2026-06-11. Copy a ready-made reference: