

Having only watched a couple episodes of Firefly and the movie Serenity, I wouldn’t say “better” but different.
Serenity/Firefly is slightly softer sci-fi, while I’d say The Expanse is fairly hard sci-fi. Expanse, at least in the books, they actually go weeks and months in space between stops and make it a point to tell you; while from what I remember in Serenity they treat going to another planet as going on a couple days road trip.
But Amos is my boy. I love Amos Burton.
He is That Guy.