hahaha what a weird question
i think sean is a great drummer, so far he is doing a great job of playing my drum style from the albums.
we haven't actually put sean onto any of the super fast stuff (280bpm+) but i'm sure he will be able to handle it.
as far as speed goes, the fastest i've ever played is about 310 bpm on the bass drums (when playing a faster version of the track 'Worlds beyond the veil' and about 360-380bpm on the hands (when playing Tomb of kings) a few years ago, (which is faster than any recorded Mithras material).
as far as speed goes, from what i've heard i've played a lot faster than him, but then again i used to concentrate on super fast stuff, so there's no telling what he will do when he really gets his teeth into the super fast material.
it's not for me to say who is the better drummer, but let's put it like this, he is good enough to drum for us live, so he is very very very good!