Well, after going back and doing more A/B there is zero doubt the ceramics are smoother. BUT, thats not a good thing in my amp tho it could be in some. But i find that as treble peakers in the preamp they lose definition and when i add brightness to get that back then i also get back of spikiness i mentioned when rolling the guitar back for cleans and the clarity is still not as good. So i can say w/o reservation theres a very obvious difference but like most things it's only good if it's what the amp needs. If this amp were very bright i could see ceramics being beneficial. But i have a lot of control over the top with this amp so i don't need that because i can mimic it with the NFB knob and a couple other switches i've put in the amp. But i can't seem to mimic the opposite, so ceramics are out for now at least. I'll see what happens saturday when i get to try in in a band context. I have no idea how the amp will ever be overal because i redesigned the preamp and this will be the first time out with it in this configuration. So it could be i'll find it harsh and then the ceramics may go back in and see how it sounds next time out.