No. Beyond technical stuff and Apple, Wozniak is a simple man with a good heart but still a rather simple man who apparently doesn't appreciate money all that much. Beyond math, science and Google, Brin is an idealist with grand ideas about the world. Expect much more from him in the future since he does indeed have a lot of money, understands money's potential very well and is careful about investing in anything now knowing that later he'll be even more mature and will make much wiser investments.
I am not so sure about that. MS has had significant contributions in research that is not directly relevant to Microsoft's current revenue streams - but I haven't heard if Gates was directly involved in any of them. Brin, on the other hand, appears to be spearheading that stream of research and development.
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