http://www.serebii.net/black2white2/versionmisc.shtml There's a list of some differences between the two games. There's also things like exclusive Pokemon and different areas (Black 2 has a water tunnel, and I think White 2 has a lava...something?). So just pick one new game based on what you like better! Personally, I got Black 2 :)
I think I'll go with Black 2 too. I had wanted White 2 because of the Pokemon that Black 2 doesn't have, but I got most them a few days ago from my other Pokemon games :) Plus the combination of Zekrom and Kyorem looks awesome! :D
I don't own either Pokemon White/Black, don't plan on owning it (yet). It's been a VERY long time since I last played a Pokemon game (about 10yrs) but I am interested in Black/White 2. If I just wanted to go in an enjoy either Black/White 2, which do you guys recommend? (taking in the fact I don't know the vast difference in the Pokemon exclusives). Thanks!
I would really recommend you get Black or White first. Because 2 is very story driven and based on the events of Black/White you probably won't get as much out of the game without playing the first one.