I don't personally know but when I told him how much I liked the call his exact reply was "...if you like the hickory glass you should hear the high standard Crystal".
BTW, I do like it with that Snakewood but think it sounds even better with a 1 piec Ipe striker from Andy Kaiser. I didn't get around to making a soundfile with it though. That 2 pc Rosewood really shines when played at low-medium volume. I'm not sure the soundfile does it justice honestly.