Unlike the Baldur’s Gate series, Neverwinter Nights 1 and 2 use different rulesets (3rd Edition vs 3.5 Edition). There are also quite a few different classes in each game. These are enough differences to warrant separate pages.
Bioware’s Neverwinter Nights 1 site was my primary resource when I first played the game, but they recently shut it down after EA bought them out. The Neverwinter Nights 1 Wiki seems to have filled that void nicely, though. It has all the stats for everything in a clear and readable format, including notes about any bugs the game has where a feat, skill, or spell doesn’t work exactly as worded in the game.