I came to the Modwright from being a tube guy, so can't add much to what I've already said regarding your last question here. The only direct comparison I've done to another SS amp was to an Ayre V5XE, which is another SS amp that I really liked, but the KWA150 did certainly excel in bass authority to that particular amp. I was considering buying the Ayre and had it in my system for about a week and liked it, but decided to keep my KWA150 because I preferred it to the Ayre overall. The Ayre had a slightly softer presentation - a bit less resolving perhaps, but very musical and engaging and not typically SS. It's an A/B amp, but reminded me more of a class A amp. Nonetheless, I preferred the greater resolution of the Modwright, since it was not at the sacrifice of any of the qualities I enjoyed about the Ayre. It also did do better at bass, and marginally better at soundstaging (though that was a close call). I was using the Coincident speakers at that time (double 8" side firing bass drivers). Other than that, I've done no direct comparing to comment on such a question, but hearing it playing with Lou's speakers one would never say that it was even remotely lacking in the bass department, especially the Ulysses. Perhaps someone else has made some direct SS comparisons. You might check the Modwright forums, mentioned previously, as well. Good luck!
