I don't know if I'd say one is better than the other, but when I first started shaving I had both a hollow and a wedge. The hollow, for me, was harder to use (didn't know why then and don't remember why now). I'd get nicked every which way. Thinking back, I think it's because I didn't have a light enough touch. With the wedge this wasn't so much a problem, I suppose, because I needed the slight bit of extra force to move the heavier blade. On the hollow, however, it was just way too much so perhaps the razor ended up skipping all over the place. The downside to this was, and still is, that the heavier wedge will cut skin bumps more easily than a hollow, so a rookie would need to know/learn that.
After shaving with the wedge pretty much exclusively for a long time, I went back to the hollow, and it much, much easier to use and get a nice smooth shave. So maybe your hypothesis is correct? Or partially correct? As always, there are many ways to practice and learn a skill that lead to the same end result.