Haven’t heard either one but something you should be cognizant of is the disparity in cost. The Soulution is listed as $45K whereas the Diablo is around $23K. In addition, it looks like there has been a slight reduction in power with the former, from 120W to 100W. There was a huge increase in cost with the Soulution, (eg 331 from 330) which may or not be justified depending upon your ears.
Soulution 331 vs Gryphon Diablo 333
It's probably a long shot, but has anyone been able to do a direct or indirect comparison? I would like to hear your impressions of either. I'm looking to simplify my system, and these are the frontrunners I'm considering.