Its ultimately the same core engine that VC and various other dev teams (Treyarch, Blackbox etc) have been using across the entire line (NHL, NBA, MLB) since it was still Segasports. The only things that have changed really are spit and polish graphically and new features. At the core though alot of the engine systems are still using the same code, alot of it broken code, from a good 6 or more years ago.