My take :
Proper drive of an amp is the amp being able to control those loudspeaker membranes like a whip
on all music .
Whether those mebranes have flat Fr , sufficient natural internal dampening / stiffness / good Magnet /coil motor system is another story .
I think of it as a car analogy .
Driving 60 miles per hour with a normal sedan or a ferrari is the same speed .
But the way they accerelate (and brake /decelerate ) is quit different, the " jump factor" .
On tubes i have not heard a better one then CAT .
Lamm may have more refinement when paired with the right speaker , at least thats the opinion what i read most.
So peter might have covered both with his new ( 60 years old, lol ) high eff horns .
But i could not say because i have never heard them.
Ps I must say those latest Arc 160 m s sound nice also at least on you tube .
I d love to hear a vid of peters system in due time .
And you can say what you want
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
, but peter doesnt " cut corners "