On top of adding new characters, SNK made significant tweaks to the other challengers in The King of Fighters XIII. This video demonstrates what’s different. For example, you only need two super meters when in hyper drive mode to use a NEOMAX attack instead of three.
This post on MM Cafe explains all of the changes in detail. Interesting to note that Benimaru was rebalanced so attacks that weren’t used in the arcades became more useful while Clarks most used moves, throws, were buffed further.
The King of Fighters XIII comes out on November 22 for PlayStation 3 and Xbox 360 in North America.