Originally posted by Michael Billings
Bigger circles in Chinese Kenpo, more techniques, less articulation of principles, generally lower stances, great power (generally), way cool weapons forms, etc. My 1st Black was in Chinese Kenpo before we moved under Mr. Parker directly. Loved them both, and had a great foundation. But I have found a home and a systematic approach and logical interpretation of the study of motion, primarily as it applies to fighting.
Lots and lots more in terms of philosophy, spirituality, stylistic differences, but I think you were asking more for the physical differences. Good resources are Dennis Conatser, Ricardo Casitillo, Seig, myself. Ricardo is still doing a Tracy (more Chinese) system, whereas Mr. Conatser, myself and Seig moved over to American Kenpo, specifically Ed Parker's Kenpo Karate.
Hope this helps a little. It is a short answer to a question that has been around and around. You may want to search past threads in the Kenpo - General Forum. There are extensive discussions.
-Michael