Can get both types of grinds the same amount of sharp though the technique to get there is slightly different. The full hollows I have made are generally more flexible than most vintage full hollows and I experience similar shaving comfort and closeness between those and the 1/4 hollows I’ve made. As far as an apples to apples comparison I have control over every aspect of the build except for the steel content.

Now on to your thought exercise. I can’t see how, given equal parameters that the edge would be any different in profile or how narrow the apex is. I can get to my ideal edge much more easily on a full hollow than a wedge or similar grind. With the ability to flex the edge enough to clear more material behind the edge makes it easier to get your stones to hone all the way out to the edge. Though the idea is no different than changing the tape or adding a strip as you hit your finisher.

I think the biggest perception of difference in edges is most likely located in the hands of the end user.