Jean-Pierre Fux was 285 lbs at a height of 5'11. Going by your logic, he was as muscular as Ronnie at the 2003 Olympia. Obviously, this is not true. You don't take into consideration Nasser's bigger bones and significant water retention in his back when claiming that he was as muscular as Ronnie was at the 2003 Olympia. No bodybuildercarried that much leam mass at that weight. No one.
Yes, JP Fux was up there too, as well as Markus Ruhl. Like i said earlier, bones make a couple of pounds difference max. have you ever picked up a bone before and felt how relatively light they are? Imagine how many bones you would have to put on a scale to tip it by anything more than 5 lbs? No way that Nasser and Ronnie's difference in bones is more than 2-3 lbs!