I thought sephiroth just wanted to destroy everything so that Jenova could recreate the world?
The rest is fairly standard stuff though; the only real similarities that wouldn't be found in a dozen other places is the hair colors. Byakuya doesn't have a 7-foot long sword either.
I think comparitively the only other similarity (which, honestly, is quite common even in applications including varying behaviors from human interraction) between the two is the "Me > You" symplex. Either way, it makes for an entertaining watch. It's not a working formula for an interesting story without reason.