Here's why I disagree:

https://imgur.com/l71hsUZ
- Dorian's arm is longer.
- Dorian's arm is nevertheless more muscular, substantially thicker. It's called the "Side Tricep," and he's absolutely owning Labrada Jr. on tricep size and shape.
- Dorian has better conditioning overall.
- Dorian has a more aesthetic waistline.
- Dorian has larger and substantially more defined calves.
- Dorian's legs are longer and his physique is overall more balanced. Labrada has the proportions of a short man.
The one point that I'll concede to you - and one that stood out to me too when I inspected the photo more closely - is that Dorian's arms are longer, and with similar thickness per inch of his arm length, Dorian clearly wins that pose for what it is, which is the side triceps shot.
Dorian's arms are just as thick, if not slightly more thick [again, judging from THAT photo comparison, which was obviously selected to favour Hunter], and Dorian's arms are longer, making his increased thickness compared to Hunter even more impressive.
That being said, to your other points, I'm not so sure. Yes, Dorian's calves are better [much bigger] than Hunter's calves, but is that really apparent in that photo comparison? I would say no - they look roughly the same size. I would say that Dorian's calves look bigger in that shot, but not by much. Again, we are comparing a photo of Dorian to a zoomed in photo of Hunter that is height-adjusted to make Hunter look bigger and compare more favourably to Dorian when he actually wouldn't, had both bodybuilders compared that pose on the same day [possible in the future if either Marty McFly or Marty Champions invents a time machine].
I agree with your other comments in that Dorian IS better than Hunter in the areas you specified - I'm merely saying that, aside from the arms/triceps shot in particular, that Dorian's advantages over Hunter are really not that apparent in that photo comparison, and again, that is because the comparison was created to make Hunter compare favourably to Dorian.
So to be clear - I'm agreeing with you that Dorian is better, and that his arms/triceps in that shot are better [longer with just as much thickness per inch, if not more thickness] than Hunter's, but everything else is pretty close, due to the manipulated nature of that photo comparison.
No knock on your views - I'm just saying that in this manipulated photo comparison, Hunter is pretty close to Dorian. If they actually posed side by side on those same days [through time travel, cloning, or magic], you would see that Dorian is very much ahead of Hunter.
And I'm not knocking Hunter either - he is an excellent bodybuilder. He has the symmetry genetics of his father, but is 5'9.5", which is a great height for bodybuilding. I seem to recall he injured his pec, and I don't know if that recovered, but if he stays injury-free, I think he can do quite well in bodybuilding. Maybe not be at Dorian's level of Olympia wins, or win any Olympia contests at all, but I think he can make it to the Olympia stage, and be a contender. He's a good, young bodybuilder with a bright future, providing that he doesn't get hurt, or overdo the gear and damage his organs.
Is he at Dorian's level? No. Does that photo comparison look pretty darn close between the two of them in that pose? IMO, yes. Although I do acknowledge that that photo comparison was made to advantage Hunter.