It comes down to semantics again:
Point #1
Musicality
Point #2
Musical
Point #3
Talent
So musicality is possessing a quality that is defined as a subjective thing or a subjective measure of a subjective thing. Subjective because what's appealing to some, may not be for others, and what's artistic to some is crap to others. Some people like gangsta rap, but I sure as hell don't. I like hip-hop, but I know a lot of people who don't. I think taiko is annoying as piss, but most Japanese folks seem to like it just fine. So I might hear some guy beating on some drums thinking he's just making noise, but taiko lovers would recognize it as being musical. Is abstract really art or is it just a bunch of random lines and splotches being called art by some hippy douche who can't paint realistic looking things? So, by definition, yes, all opinions of what is musical are equal.
To directly answer your question, no, you wouldn't have a definitive "more musical" drummer, you'd have a consensus of people who believe that drummer is more musical.
On a side note, I don't know why I argue semantics so much. I think it's my OCD. We all get to have at least one, right?