Killgore has some altered combos IIRC.
Are all unique off the top of my head. PPP also doesn't continue into anything else, unlike the handgun weapons.
Durga isn't fully unique either, though. Lightning Durga shares its major combos with the handguns.
Also you made me think that Kulsheda was in Bayo2 for a second. Kulsheda's the whip from Bayo1.
The weapons definitely are more unique in Bayo2 though, and it's made even better by all of them having fully Pure-Platinum-viable movesets. I always hated how Bayo1 Rodin, a lot of charge moves, and (to a moderate extent) Shuraba tanked your combo score arbitrarily.