2 is better, however, White would come first on my overall favorites list because I liked it more in it's prime than White 2 in it's, and it was just more original overall.
White 2, however is no doubt a more polished experience than White. For one thing, I loved the PWT, the new water gym leader and town that came with it, and the option to use repel again automatically (THANK YOU GAMEFREAK I LOVE YOU!!!!!). I also like how I was finally able to capture one of my favorite pokemon, Elekid, and use it on my team
However, White 2 did not offer as much as it should have, being a numbered seqeul.
Overall, I'd say an 85/100. B