So, for those that don't immediate recognize the names (or think... I know them, but from where), it's Pagan's Mind vs Vanden Plas. Both have very distinctive voices - unsurprising from European prog-metal acts... Rue from Norway; Kuntz from Germany. I dig both bands, but probably give the edge to Vanden Plas. And frankly, I've been spinning the fuck out of their Netherworld release from earlier this year.
Kuntz gets the edge for me.