Tekken 6's customization was pretty limited. Some characters had a lot of options, but others, like Lars, had very few. However, Tekken characters generally have awesome standard outfits (whose colours you could change), so it wasn't that bad.
TTT2U is a major improvement in that area. They also added more and better item moves (I've posted a vid in the other thread, if you want to see them). Here's a list of all the items currently available: tekkenzaibatsu.com/forums/showthread.php?threadid=122013
Take into consideration that Namco still updates the arcades adding more items, so they're will be probably more in the future.
I don't have VF5, but I think it has more stuff.