Ryu and Ken studied at the same dojo for ten years and have the most of the same techniqes. Ken is more agresive in the movie and Ryu has more endurince. in the US Ken Masters became the #1 marital art champion, where as Ryu travled alot. but as for whos better? well in street fighter 2, Ryu beat the crap out of Sagat and Fa Long. Both of wich are powerful fighters.