I think the rivalry is mostly in feature set and personal needs for that aspect. As is known, the Mesa has far more tone shaping capabilities, along with the effects loop and pre- master direct out. As far as my statement on the power section, basically the best way to describe it simply is that where i've had to push the Mesa a bit, i've had to pull back on the Quilter. The over all transient response across the frequency spectrum on the Quilter seem to be a bit tighter, and although there is no limiter indicator on the Quilter output, it seems to get louder than the Mesa while maintaining it's fullness . I just spent the last 10 minutes switching between the two power sections, with the Mesa as the preamp. The power section on the Quilter still has those described tighter transients.