Any theoretical advantage is worthless if the cam isn't actually ground to take advantage of the lifter diameter.

We have a cam analyzer at the shop, and one of the outputs is minimum lifter diameter. The Lunati Voodoo cam I checked needed a min .88x diameter lifter, which allowing for design margin, etc indicates something that was designed and ground to take advantage of the lifter advantage.

I don't have much for comparison, almost everything we do where we bother to analyze everything to this level is .904/.937/1.00 roller tappet. Haven't seen any 1.062 yet, I think that'd be interesting. S/F....Ken M