Fane = Asterion
Lohse = Gale
Shadow Heart = Red Prince
La'zeal = Sebille
I really don't see it... Definitely not to the point of calling those "minimal changes." Then again, D:OS2 character were so poorly developed I strugge to recollect much beyond what their intro cutscenes stated.
Maybe beside Asterion vampire gimmick being as underwhelming as Fane's undead one, but that's more of a gameplay thing, then character thing.