I find the Core Game and Game play. (arcade mode, vs and gameplay) to be better than street fighter IV...
That's exactly what I've been thinking. Since I just bought Tatsunoko vs Capcom, but haven't had the chance to play it with my friends yet, that I'm having second thoughts on buying SF4. I mean, SF4 is great, but I consider myself a hardcore when it comes to fighting games, and even though I'm not a high level at all games I play, I'd like to at least have the chance to be.
The comment I heard about some pros of SF4 was that the game doesn't give you much room to be creative, even though it's good. And I kind of agree, every Saghat match looks the same, every chun li, and etc.
With Tatsunoko its the other way around, much more versatile, not to mention that for the fact the you use two players things can get much more creative.
Anyway, I think I'll stick with Tatsunoko and maybe get SF4 in the future and it gets cheaper.
Oh, and the online component, let's pray they put it in the US version, and that it is good, and little to no lag !