I own both hockey games.
I had never been one for fantasy drafts, and i never really played around with them, but after playing around with it in this game, i realized just how much depth it can add to a game. you can setup a team that is filled with players that you would never expect to play with. this also evens out the teams throughout the league, and makes the games even tougher.
Overall this game is just a better experiance than nhl 07. it has a very long life with all of it's features. Now don't get me wrong, NHL 07 is still very good, and it is definatly worth a rental at the least, but if you had to pick one game, i would personally suggest nhl 2k7.