CYBEX Sirona S vs. Nuna aace: Which is Better? (2024)

Hi there! We're here to help you decide between the CYBEX Sirona S and the Nuna aace.

Our goal is to provide you with the information you need to feel confident that you're choosing the optimal car seat for your family's needs and budget. Let us know if you have any other questions!

At A Glance

Our Thoughts

When it comes to selecting the most suitable car seat for your child, safety, comfort, convenience, and cost-effectiveness are key considerations. With that in mind, let's compare the CYBEX Sirona S, which is a convertible car seat, to the Nuna AACE, a high-back, and backless booster car seat.

The CYBEX Sirona S is known for its innovative 360° swivel feature, a convenience that makes placing and removing your child from the car effortless - a huge advantage particularly in tightly parked spaces. But its most significant value lies in its advanced safety technologies. It's equipped with SensorSafe technology that provides real-time updates about your child's well-being—like if the safety harness becomes unbuckled unexpectedly—right to your smartphone. It also impresses with its high weight capacity, which, for reference, accommodates up to 65 pounds in forward-facing mode. However, it loses points for its complex installation process and its larger size, which may not be best suited for compact cars.

On the other hand, the Nuna AACE is acclaimed for its longevity. Designed to grow with your child, it transitions comfortably from a high-back to a no-back booster, perfect for children aged four and above who have outgrown the initial standard car seat phase. It flaunts sophisticated safety features such as advanced side-impact protection and a belt positioner for enhanced security. Plus, it's praised for its easy installation and machine-washable fabric for conveniently keeping it clean. But do bear in mind that it's not suitable for children under two or those under 40 pounds, as this seat doesn’t offer a rear-facing configuration, which is the safest position for these younger passengers.

In terms of recommending between the two, the choice is conditional. If you're starting from infancy and need a car seat that offers versatile weight accommodation, the CYBEX Sirona S is a stellar option. It offers remarkable safety alerts with its SensorSafe technology and a unique swivel feature for your convenience. However, if your little one has already transitioned from an infant car seat, the Nuna AACE could be a more fitting choice. It's a top-tier booster that can serve your child for several years, and it emphasizes ease of installation and cleaning.

Remember, the best car seat depends on your child's current weight and age, your budget, and the features you deem most important. Both car seats promise safety, but each offers unique strengths that may better suit your particular needs.