Jobs, innovator; Gates, expansionist.
While I have always been opposed to the proprietary nature of Apple's products, there is no question that Jobs has been the consumate innovator in bringing new concepts and products to the public. Unfortunately, that proprietary nature severely limited the scope of penetration of the Apple computer. Had he opened up the hardware architecture to third party development, Gates and Microsoft would not have commanded so large a portion of the PC market.
It is Jobs who brought the innovation, but it was Gates who saw the larger market potential. Gates excelled at recognizing good ideas and then expanding upon, or (gritting my teeth), improving upon them.
