Some say the CBS headstock carries the curse of Leo. Or, it automatically enrolls you in some sort of record club... I dunno.
Perhaps, on a chambered body with a lightweight trem, it might cause a bit of neck dive... thats about all I can think of.
Wait, one more thing, the added mass of the headstock, better for sustain (by an infinitesimal amount).
Wait, another one more thing, the CBS headstock makes a better canoe paddle (given the choice of CBS/non-CBS).
Ok thats it.
Dangit, thought of another. The decal. The CBS decal is mo'harder to find if you want that sort of thing.
Ok, thats really it this time.
I hope....