To attempt to answer your question the transformers set will determine how the amps will sound. In the early days of the 18 watt forum this was a topic of discussion.
I have an early Mercury 65 Amps transformer set in my 18 watter and it’s quite jangly and has strong mids when pushed. I don’t know if this was the transformer set use in 65 Amps production amps.

If I have criticism of the transformer set, it is that it could have more bass response. It’s adequate with a Les Paul, but a bit lacking with a Strat.

I hope that’s of some assistance.

Regards

Mark

I became upset reading through a plethora of web materials about force-sensitive and humistor resistors. It was difficult to understand the key distinctions because there were neither enough elucidations nor excessively technical stuff.