This isint going to be anything different than what has been metioned already....

The foundation of Floyds style has to be attributed to his father, Boxing is all Floyd has ever known and been exposed to his whole life... But with that Floyd is no robot and was able to think and put his own stamp on that style through trial and error and just being a product of his enviorment Floyd is extremely motivated and driven to be the best, so thats condusive to him not being content with what was presented to him but working hard to make it better, like him or hate him he is a phenom and a Virtuoso..

I think Roger probably has polished his attributes like speed and coordination and ring intelligence and help him tie it all together and be more efficient