The obvious difference, Jay fashions himself "The Black Warren Buffet"...love or hate it, that he's an unabashed capitalist has never been in question...it's a big part of how presents the "jay-z brand"...(and he still catches plenty flack for it)
kanye on the other hand tried marketing this past album as some kind of anti-corporation anti-establishment rebellion music project, on some RATM type shyt...having these staged rants where he's screaming "Fukk all these corporations and sell outs :damn" ...then proceeds to sell songs from that very album to serve as commercial singles for multi-national corporations...it's laughable