No the character style is very different. i had the pleasure of attending the Pixar panel at ComiCon on Saturday ( I was there for another entertainment property so I got to sit in the velevt rope studio section up front). It was a joint Bolt/Up panel and they shwoed about twenty minutes of bolt, plus a few extended scenes from up. First off- Bolt looked great. I have not been looking forward to this film,a nd thought teh trailer was stupid. It made me long for Chris Saunders version, but after seeing twenty minutes of film, I cannot wait for this movie.
As for Up, it's definitely different. Pixars films keep getting more adult,a nd I'm anxious to see where this one goes. It looks fantastic though and I have a lot of faith in Pete Docter!