Both sounded great to my ears. As much as I can mentally interpolate from a random iPhone recording.
I hear a bit more sizzle from the SLO. My comments not meant to be dogmatically annoying (none of us hear the same obviously).
All these years never played through the Mesa Tremoverb, or even a Dual Rectifier as popular as they are. Suppose I should before I die (at 64 that could be anytime).
My son gets my 2 SLO's and my Wizards though when I die