I actually did not notice anything different with the animation.
I saw a lot of beautiful effects, but no characters looked weird or different. Only Kabuto did, and that's just because he does not have Orochimaru's chakra in that time
Edit: I thought you were talking about the episode before that. I'm gonna watch 291 and see if I can see anything different...but for the record, I didn't pick up on any different animation quirks in 290.