Spent some more quality time with it last night.
This time I A/B'ed it against the C30 using the Epi 339 P90 Pro.
Findings (to my ears, anyway):
*Clean channel: Quilter > C30
Even with the difference in speaker size (8" vs. 12"), the Quilter sounds more focused and punchy, without losing much bottom end. The C30 actually sounds somewhat boxy and a bit hollow in comparison
.
*Gain channel with light gain: Quilter > C30
Still, same as above, and both respond to picking attack. Not much difference, though, but still surprising.
*Gain channel with medium or more gain: C30 > Quilter
Not surprisingly, typical of tube vs. SS, the more the gain, the rattier the dirt is with an SS amp, while the tube amp sounds creamier. When the gain is past about 2 o'clock, the Quilter sounds like solid-state ass. I wouldn't be cranking the gain too high on either amp, anyway, so this category is kind of moot.
Now, put your favorite OD pedal in front of the Quilter clean channel/light gain channel, and it sounds fantastic. Same with the C30.
Bottom line: no remorse here - the Quilter does exactly what I want for my purposes, and the rest of my amps are going to be shipped out.