Well you see TK4 will be a kinda of sequell to the Tekken series thus it will boast of the same game engine as the the previous tekken games would.On the other hand,VF4 will boast of something new and so also will TK4 but TK4 will receive an edge over VF4 due to TK4s popularity among gamers.But remember the VF series is an old series thus experience would set into play here and the VF4 Crew might have sat down and annalysed the main flaws the previous tekken series had to offer.Conclusively,ITS oFFICIALLY A DRAW.