1 – brisk doesn’t have its own standard. You don’t have to be a top bochur to get in; you have to come from a Yeshiva which is alloted a certain amount of slots and have a recommendation from the rosh Yeshiva thereof. There are guys in brisk who aren’t very into learning, don’t keep sedorim, etc .. The vast majority are big bnei torah, but there’s not much hashgocha there. You make your own goals, standards, and choose who you associate with.
The top guys in brisk aren’t any better than the top mir talmidim.