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Quick verdict
Choose the Chicco KeyFit 35 Infant Car Seat if you want fits from 4 pounds with the included insert, one of the lowest starting weights of any infant seat. Choose the Evenflo Sonus Convertible Car Seat if you'd rather have light and easy to move between cars. Overall we rank the Chicco KeyFit 35 Infant Car Seat higher: #1 versus #3 in our Best Car Seats for Small Cars list.
Winner overall: Chicco KeyFit 35 Infant Car Seat
Chicco KeyFit 35 Infant Car Seat vs Evenflo Sonus Convertible Car Seat compared
Every difference that matters, in one table.
Keep researching
- Best Car Seats for Small Cars
- Chicco KeyFit 35 Infant Car Seat review
- Evenflo Sonus Convertible Car Seat review
- All car seats
Bottom line
Choose the Chicco KeyFit 35 Infant Car Seat if you want fits from 4 pounds with the included insert, one of the lowest starting weights of any infant seat. Choose the Evenflo Sonus Convertible Car Seat if you'd rather have light and easy to move between cars. Overall we rank the Chicco KeyFit 35 Infant Car Seat higher: #1 versus #3 in our Best Car Seats for Small Cars list.
Top pickChicco
Fits from 4 pounds with the included insert, one of the lowest starting weights of any infant seat
- Fits infants 4 to 35 pounds
- Removable infant head and body support insert
- Stay-in-car base with load leg and level indicator
- UPF 50+ full-coverage canopy
- Compatible with most Chicco strollers for a travel system
✓ Pros
- Light and easy to move between cars
- Budget price for a convertible seat
- Rear- and forward-facing use
- Compact enough for smaller back seats
✕ Cons
- Fewer padding and convenience features
- Harness height adjustment requires rethreading
- Less legroom rear-facing than extended-legroom seats
Evenflo
Evenflo's Sonus is a lightweight, affordable convertible seat often chosen as a second seat or for travel.
✓ Pros
- Light and easy to move between cars
- Budget price for a convertible seat
- Rear- and forward-facing use
- Compact enough for smaller back seats
✕ Cons
- Fewer padding and convenience features
- Harness height adjustment requires rethreading
- Less legroom rear-facing than extended-legroom seats
FAQ
Common questions
Which is better, the Chicco KeyFit 35 Infant Car Seat or the Evenflo Sonus Convertible Car Seat?
Choose the Chicco KeyFit 35 Infant Car Seat if you want fits from 4 pounds with the included insert, one of the lowest starting weights of any infant seat. Choose the Evenflo Sonus Convertible Car Seat if you'd rather have light and easy to move between cars. Overall we rank the Chicco KeyFit 35 Infant Car Seat higher: #1 versus #3 in our Best Car Seats for Small Cars list.
What is the difference between the Chicco KeyFit 35 Infant Car Seat and the Evenflo Sonus Convertible Car Seat?
The Chicco KeyFit 35 Infant Car Seat stands out because fits from 4 pounds with the included insert, one of the lowest starting weights of any infant seat, while the Evenflo Sonus Convertible Car Seat stands out because light and easy to move between cars. The trade-offs differ too: the Chicco KeyFit 35 Infant Car Seat's ma in caveat is that height limit around 30 inches means many babies outgrow it before 35 pounds, and the Evenflo Sonus Convertible Car Seat's is that fewer padding and convenience features.
Is the Chicco KeyFit 35 Infant Car Seat worth it over the Evenflo Sonus Convertible Car Seat?
For most buyers, yes: it's our #1 pick. Consider the Evenflo Sonus Convertible Car Seat instead if height limit around 30 inches means many babies outgrow it before 35 pounds is a deal-breaker for you.
Who should buy the Evenflo Sonus Convertible Car Seat instead of the Chicco KeyFit 35 Infant Car Seat?
The Evenflo Sonus Convertible Car Seat suits second cars, grandparents and travel, while the Chicco KeyFit 35 Infant Car Seat is best for newborns.
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