Jazz is my favorrite. Some people say Spaz can jump higher than Jazz, but I did a test on JJ2.
1. I came to a pretty high ledge with Jazz.
2. I super-jumped with Jazz and saw that he could get on top.
3. I walked Spaz over to the ledge.
4. I made him do a double-jump, and the tip of his ears were touching the ledge (somewhere around there.)

That kind of is out of the topic, but YOU RULE JAZZ!