Firstly, I'll give my final thoughts on the arms debate. All things considered: size, shape, symmetry, proportion and definition, I call it a draw.
Size: Sergio, due to the fact that he had larger forearm flexors than Arnold. Everything else is equal.
Shape: Equal. Arnold had better biceps shape, whilst Sergio had remarkable triceps shape from the front
Symmetry: Equal.
Proportion; Equal. Both men had different proportions in the sense that Arnold's biceps (arguably) overpowered his triceps, yet Sergio's triceps (arguably) overpowered his biceps.
Definition: Arnold edges out Sergio on definiton in various poses, especially back double biceps.
GoneAway...
I posted pics on this thread comparing the comeback physiques of Arnold Schwarzenegger ('80) and Sergio Oliva ('84/'85). Who do you think had the better "comeback physique"?
It's so close, Pollux. They're both ripped to shreds, though Arnold has better cuts on the front of his quads and through his serratus/intercostal tie in. Sergio appears to be carrying more size, yet Arnold isn't slouching in that area either. For some reason, I'm leaning towards Sergio.
