Nuna AACE vs Diono Solana 2

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	Nuna AACE	Diono Solana 2
Stage	Booster	Booster
Narrow (3-across)	–	✓
Extended rear-facing	–	–
FAA-approved	–	–
Lightweight / travel	–	✓

How they differ

• the Diono Solana 2 is listed narrow (roughly ≤17″) for fitting three across a back seat; the Nuna AACE isn't listed narrow
• the Diono Solana 2 is the lighter, more travel-friendly model

Where to buy

Check the Nuna AACE price on Amazon →

Check the Diono Solana 2 price on Amazon →

As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Affiliate links never affect our specs or which seats we compare.

FAQ

What's the difference between the Nuna AACE and the Diono Solana 2?
The Nuna AACE lists none of the narrow / extended-rear-facing / FAA / lightweight flags; the Diono Solana 2 is narrow for 3-across, lightweight/travel. Both are booster car seats.

Which fits three across, the Nuna AACE or the Diono Solana 2?
The Diono Solana 2 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 Nuna AACE or the Diono Solana 2?
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.

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