i don't think versus has better graphics then 13 or 13-2 its merely because versus has a different theme (more realistic, as if similar to the real world cities and stuff etc) due to this we think it has better stuff while it doesn't, the only difference is gonna be the battling system and stories. Both are part of Fabula Nova Crystallis means their story revolve around the same foundation, which leaves us with one thing that is the battling system and that makes versus triumph over 13-2
ATB System=Too slow
KH Battle System=Bada$$