Definitely. Jiji (the cat) has a totally different character if you listen to the dub vs the original Japanese. One of the few instances where I prefer the dub... but I think it's just because I watched it that way as a child. This article [1] is convincing me to go back and give the Japanese audio another try.
Anyway: if you like the movie, I would recommend tracking down the book. Some of the movie's scenes are lifted directly, but (as always) there's scenes I would have loved to see show up in the movie that didn't.
Phil really does a great job.
True, but that is a rare case where the dub is making a gigantic improvement.
Improvement is a relative term in all contexts by definition.