Okay you want a definition?
Arnold's clearly has better separation in his traps when viewed from the back , he shows much clearer definition of the teres major & minor and the infraspinatus as with the calves Arnold's show better development & separation of the gastrocnemius inner & outer heads
Now poor conditioning isn't going to solve everyones problems , you think if Sergio dieted down some more the development of his rectus femoris will magically appear? Sergio never really showed great upper quad separation this is a result of developing the muscle in the first place and then having the right conditioning to highlight it , the conditioning would help with muscles that are visable already like his seratus and his abdominals which were developed when he was lighter , but Sergio couldn't replicate his conditioning at 220 pounds at 240 pounds and Arnold's conditioning actually improved the bigger he got.
Sergio looked better with size and he would have killed Arnold with size & great conditioning but that wasn't the case , Sergio had fantastic proportions and balance which many have matched to this day while retaining an amazingly small waist , Sergio was responsible for the way he showed up on contest day , he had to find a balance between size and conditioning and he did in 1972 but he still lost instead of letting that loss get to him ( if it was legit or not ) he should have drove himself to the end of the Earth to create a package that the judges just couldn't deny , Ronnie almost lost in 2001 and 2002 and he was talking a lot of heat and he did what he had to silence everyone in 2003 .
This
all comes down to better conditioning. Unless you're a freak-mutant, we
all have the same muscles distributed over the body- you don't create new muscles as you get bigger. If you can't see a muscle, it's because you aren't conditioned or ripped enough to show it. You don't need to have ever visited a gym to show ripped quads with all four heads or striated and separated pecs.
No one's making excuses for Sergio's shape- that's a straw man. Sergio's conditioning was rubbish compared to Arnold, end of story. However, conditioning and superior pectorals, plus money-biceps does not equal an olympia physique when the guy standing next to him is almost flawless. Sergio was better balanced and proportioned than Arnold- it's pretty obvious really, for the same reason that Cormier and Ray were better balanced than Wheeler. Arnold's chest was too good for a number of other bodyparts- eg, his shoulders- whereas Sergio's was in proportion with the development of the rest of his physique.
I've listed Arnold's flaws earlier in this thread.
No one has argued against them, so I take that it's undisputed. Sergio did not have as many flaws as Arnold- most of his are down to conditioning. That's all.
Seriously, I've not said anywhere that Arnold had a shitty physique. Arnold was awesome, but this is a comparitive debate. I've merely pointed out his flaws, as flaws are as important as what you do have when making a comparison.
To say that Sergio was a guy only with arms as realkarateblackbelt is just boggles the mind- it really detracts from the overall credibility of his posts.