See, here's the thing.
Athletically and from a purely physical gift / tool set? Yes. I think if you could find a way to just simply break down who has a stronger arm, a little more fluidity in the hips when it comes to running / escapability etc - sure. Based on the small sample size, Moberly is probably more gifted there.
HOWEVER... and this is a huge however... the other stuff is also critical. The leadership, poise, grit, toughness, yes I know they are kinda the same thing but also kinda different IMO, are all things that Rocco has in spades. I'm not saying Moberly doesn't possess those things as well, he might, but IDK. That's where it gets tricky when saying oh the back ups better. Not just at QB but any position and it gets magnified as does most everything else when talking QB's. Its kinda like Beau in a sense. Beau's shoulder from reports is so banged up that he more or less is playing with one functioning arm. Now, is a safety with two arms or who can lead with both shoulders "technically" better in terms of physical traits? Sure. Kinda like Verdon with two healthy hands is better than Verdon with one hand in a cast.
But those guys all have a leadership, toughness and grit that makes it hard to say replacing them is easy and in fact its very hard to do as we've seen defensively , at least in season. When you have a whole off-season to prepare the replacement, then it becomes, in theory, slightly easier. In theory.
If you gave me the choice of keeping either Big Citrus or Rocco or Verdon or Rocco... I'm probably leaning Big Citrus / Verdon. Simply because we've seen the defense carry the team before, hell, the defense darn near carried us to a bowl game in 2022.
That's not a knock on Rocco. And maybe Moberly would be able to lead and do these things, IDK. But Rocco's an incredible gamer / competitor and leader. And while physically there maybe more skilled people out there, those traits are like a strong arm or elite speed. Not everyone has them. And we've seen the last two years that you combine good enough physical traits with elite intangibles , and you get good results.