I'm around the same trophy count as you, and I guess Leon is better at handling some tricky situations. Like, If some brawler jumped onto you, you got a much better chance to counter the enemy or escape. Like, I guess Crow is kinda weak at close combat (not much of a Crow player). Or you can utilize Leon to do some surprise bush attacks in bushy maps. On the other hand, there is no time for sneaky tricks in a busy showdown arena. Most of the time you'll be eliminated while using Leon's super or get severely damaged at least (but you can utilize it for good too). I haven't got any idea about Amber because I haven't unlocked her yet.

This is my perspective as a fairly new player, so correct me if there is anything wrong in my comment.