Both are all-in-one 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.
As an Amazon Associate we earn from qualifying purchases, at no extra cost to you. Weight ranges are the manufacturer's published limits across all modes.
How they differ
both list the same documented features for the all-in-one stage — the choice comes down to brand, price and your vehicle's fit (check both manuals)
Published limits
Mode
Safety 1st Grow and Go All-in-One
Nuna EXEC
Rear-facing
5–40 lb · 19–40 in
5–50 lb
Forward-facing harness
30–65 lb · 34.4–49 in
25–65 lb
Booster (with back)
40–100 lb · 43.4–52 in
40–120 lb · 4+ yrs
Useful life
10 yrs from manufacture
10 yrs from manufacture
Safety 1st Grow and Go All-in-One: 3-in-1 (rear-facing → forward-facing → belt-positioning booster, backrest retained; no backless mode). Figures corroborated across two independent safety1st.com product spec pages for this Grow and Go Sprint / All-in-One family (item variants CC450 and CC409) and match the general safety1st.com Grow and Go owner-center page's stated rear-facing max (40 lb/40in) and forward-facing-to-booster transition (65 lb/49in). Item-number-specific PDF manuals (CC284, CC138) are gated behind Safety 1st's Salesforce consumer-care portal and were not reachable (confirmed across three prior sessions). Expiration sourced from safety1st.com's own Grow and Go owner-center page, not an item-specific manual quote.
Nuna EXEC: All-in-one (rear-facing → forward-facing harness → high-back booster; no backless mode found in manual). Manual gives ONE overall height ceiling for the whole seat — 57″ (145 cm) or less — not split by mode. Forward-facing recommended at 2 years or older; booster at 4 years or older. 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 Safety 1st Grow and Go All-in-One and the Nuna EXEC? The Safety 1st Grow and Go All-in-One is extended rear-facing, FAA-approved for aircraft; the Nuna EXEC is extended rear-facing, FAA-approved for aircraft. Both are all-in-one car seats.
Which is right for my car and child, the Safety 1st Grow and Go All-in-One or the Nuna EXEC? 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: