They offer pretty much the same benefits. Both are remarkably lightweight seats, weighing around 12 pounds. Diono weighs exactly 12 pounds, while Skyline weighs 12.1 pounds. So, if you need to remove the seats quickly, you won't have a headache. However, Diono offers a slightly narrower seat so that you can use it for public transport or similar carpooling functions. And you don't need to assist your children when using the seat. The Skyline doesn't have this benefit, so you must lend a helping hand when children use the seat. But, since it's user-friendly, the seat offers a belt to keep them secure and stable in forwarding movements. Finally, Britax has a higher price than Diono, so you can choose as you like. But, if you prefer narrower seats, go with the Cambria model.