I like both of their styles though after watching Cowboy Bebop, I have to admit that Yoko Kanno has a greater range of variety than Yuki Kajiura, though that is not saying that I do not like her style. This is somewhat hard. I have a few favorites from Escaflowne that I simply love, though with Yuki Kajiura her songs have not sticked with me so much. Still I would have to give my vote to Yuki Kajiura from the simple fact that I probably listen to her more often.