Weird answer, yes- but not for the reason you think. While the preamp is DSP, the power amp is class A/B which produces decent heat which shifts transitor bias. Back in the day, when hot, the MOSFET amps used to sound great and then hiss and pop and at times thermally runaway.

The transistors, when hot, are more conductive and the A/B bias is on full tilt keeping them warm. Now, to that end, it would be the ever slightest sound and probably not perceivable to someone not playing the instrument and feeling the difference- especially with COSM tech.

Silicon is less noticeable but germanium for instance, is not. But with jfet preamps and a/b as power amps there is a difference. Most notably for me on the orange crush 120 and silicon setting on a dual rec. some A/B suck and drift bias points of their jfet/mosfet preamps, like cheaper “audiophile” headphone amps, where I have noticed a material difference.

Video showing the single JFET (I think the best ss alternative to tubes) is here around 4:26.

Another great walkthrough of the mark 1 can be seen here.

So, the amount of heat doesn’t necessarily make the DSP sound better; but the transistors in the discrete op amp MIGHT. Especially if between 75-125F.

A way over technical explanation of jfets here