RS its LVT (i think its for landing vehicule tracked, not sure) so no.
so the difference:
The lcvp is way much simpler: just a clear room with no roof
the lca have a half roof and some protection so if the door open and you are still sitted, waiting to come out, you dont get shot.
but in the lca, only obe person can come out at the time, so the only one to shot. the lcvp you can get shot while you are waiting ti go out (as you can see in my signature) but you can go out with 2 or 3 other people and also jump on the sides. lcvp were still used, not lca...