Both have their charms, but GT adds a lot more to the game. It took me a while to warm up to the club system, but it really does help Sims with relationships; I've had Sims that start out in a kids' club, then go on to develop romances in high school and then marriage and family as young adults. And depending on the club you can build skills as well. The more packs you get, the more options you have for your groups. I also like the improvements in dancing that came with the pack, and the DJ station and dance floor has enlivened my nightclubs. (Want to find a 40x30 nightclub for Del Sol Valley.)