I recently bought a back up head on here as my main amp is a GB Shuttle 6.0 and I wanted something sans tube. Last night was a good opportunity to try it out at length so despite having set up the Shuttle combo, I set up a second rig with this Mark bass LM2 and the other GB 1x12 cab.
Achieved my usual sound and played the gig. Guitarist says to me afterwards how much better and focussed my sound was. Just goes to show, what I thought was exactly the same, was totally different. Same cab, same bass, just the head, but to me, set up with my usual sound.
Not sure how this equates to the OPs point other than my hearing is probably shot?