THUG owns majorly at first but it's replayability isn't as good as the other games' IMO. The story mode gets old after a little bit. The levels aren't as fun to Free Skate in all the time either. I free skate a lot in Manhattan and Vancouver though, those are some of the best levels. I like Moscow too, and the School 2 level from THPS2(3 THPS2 levels are in the game for those who don't know) is great.
When I did the story, I got stuck for a bit in Moscow, the one where you escape Russia. Now it's pretty easy to do as long as I don't fall.
So far THUG 2 looks awesome. I hope that its replay value is better than THUG, though.