Interesting discussion on Bellingham. The one thing that both of you have overlooked though is his mindset. You only have to listen to him when interviewed to see that he has an old head on young shoulders.
He's articulate and comes across as having real intelligence. You don't get the standard tropes from him, he expresses a keen understanding of what is required not just of him, but for the whole team dynamic. He strikes me as one of those players that you could have a proper in depth discussion on the game with.
Combine that with the obvious talent, and that is what elevates him above his peers IMO. For example, I doubt that anyone would argue that Ross Barkley isn't a very talented player, but he's 90% air between the ears which, for me, is why he's never got beyond the level he reached. If he had similar intelligence to Bellingham he'd have been an England mainstay for me.
Sancho is like Barkley, all the talent in the World, brains of a rocking horse.