Yeah, the plug-in droid on Obi-Wan's ship has a different colored head (more purple than the preview droid) and he has a different color sticker than the R2-D2 sticker from Anakin's ship.
I had the two ships sitting side-by-side last night, and I almost prefer the dark tones of Obi-Wan's ship to Anakin's yellow. The dark greys on it bring the ship one step closer to TIE Fighter, much more so thatn the yellow.
Jeff