You can use this save editor to jump around and unlock certain things.
Resident Evil 4 & 5 PC -> [PC] Resident Evil 6 Save Editor
Played the PC version and so far the big different I've seen is in the vore deaths. Now when the character is regurgitated by either the tentacle arm or slime spitter head their upper torso is covered in a brownish slime. Also of interest is the fact that nude models of Sherry and Ada already exist in the game, complete with nipples. An apparent glitch lets you play as Sherry without her hospital gown. Exposing her goodies.