I don’t know the Expanse rpg but Coriolis is a great system and setting. However it’s lore isn’t “hard” scifi like The Expanse, it has pseudo-scientific/supernatural elements similar to Dune (which it borrows a lot of its style and vibes from).
So that might be enough to make a decision, whether you prefer hard scifi or a Dune-like setting.
I really like the Year Zero Engine mechanics with the “push” mechanic, it adds a lot of tension that works well for this style of game. The setting is unique and interesting, heavily influenced by Arab culture and folklore which gives a very different vibe to most western scifi. The supernatural elements are well integrated and the setting in general just has a lot of room for a variety of styles of play (combat, politics, detective, etc).