I've asked him about that: It's quite a heavy alder Strat w/ maple fretboard. It has a rather bright sound acoustically when compared to other Strats. Its trem is set floating so maybe there's a little bit smaller bass response, I don't know...
He plays mainly prog.metal/hard rock á la Dream Theater. He'd like something that balances out the brightness of his Strat and simply sounds HUGE. :) He has an amp with a modern/compressed hi-gain channel, I think it's a Bogner or something similar.