arnold was definitely more cut in this comp, but sergio had the proportions...
maybe if sergio wasn't black he would have been given a sweet contract from weider like arnold got and then sergio could have concentrated more on diet and getting cut.
yeah, sergio had nice round musclebellies flexed and relaxed. his quads and calves from the front, when flexed, look more shapely than arnold's in the above fdb comparison. it would have been interesting to see what would have happened if sergio had come back in 73 to challenege. he was in fantastic shape at the mr international, which was really close to the olympia, timewise.
here's a great shot of them both relaxed. certainly nothing compared to today's 'relaxed.' arnold looks as shapely as sergio here, imo. thicker upper legs really complimented arnold's physique, but in some shots they appeared smaller than they really were, to show off more definition i suppose.