I honestly don't understand the appeal of those two games. Me and my friends used to call them "puppet fighter" because the characters looked like they were carved out of wood, they moved like they were hanging by string and their moves were retardedly simple so that they wouldn't get tangeled in each other.
Now vf 3 and 4 are slighty better (of you consider a complete rip-off of tekken "better") but these games aren't really worth anyone's time. They are to 3d games like mkda and doa3, what karate champ is to sf2.

Even if you are a die hard fan, you'll maybe get 10 minutes of novelty enjoyment out of those games.
It's kind of like me and the original sf2 now. I was an still am the biggest capcom fighter fan, but at one point the games become so dated (in gameplay, not graphics) that even the most diehard fan has to say bye bye.