Hmm. I'm not getting what you mean here... With SS-WEE, how was the important midrange resolution, tone, and just overall musical satisfaction?
I just picked up an O2 and am looking to improve upon my Stax SRD7 MkII, so the WEE looks verry interesting. I shall be using my 2A3 SET and 5 watt single-ended pentode mostly, so the WEE must be able to pass every drop of bass and dynamics my amps can muster :)
I cannot speak to the midrange resolution, etc... with the Solid State amp that I am very familiar with. I was not in critical listening mode at the time..But the musical satisfaction was very high :-) I was just seeing how it would perform with a powerful amp. I had it cranked and the WEE-> O2 responded in kind.. That is when I was siting there going.. "Man, this is a f*ucking impressive piece of kit!"
I didn't get around to trying the WEE against the SRD7 that I have.. I stopped my direct comparisons once I started to get the crackle in the right driver. I cannot comment if it would be an upgrade... But I can say that I did like the time with the WEE more than previous listening to the SRD.. if that is worth anything.