Both very very good BBers in their primes, Give the Edge to Flex due to his Outrageous lines and the actual flow of his Physique, obviously Nasser was huge Massive with very conditioning for a BBer his size, if it was possible to line them up together @ their peaks Nasser @ 1995 NOC or 1996 Olympia (result withstanding) shape and Flex @ the 1993 Iron-man.........Flex given the Criteria @ the time. (pics c/o ND)