I don't think I'll ever really understand why a Watt isn't just a Watt, or at least, why one Watt sounds more powerful than another.
Going back some years, a dealer I was friendly with sold both JM Lab and BAT. I walked in one day and caught him demonstrating, to a prospective customer, how much more effortlessly the Mezzo Utopias played powered by a pair of BAT VK-60s in mono block(120W), than they sounded with the VK-300x. As I recall, there was no contest.
Going back some years, a dealer I was friendly with sold both JM Lab and BAT. I walked in one day and caught him demonstrating, to a prospective customer, how much more effortlessly the Mezzo Utopias played powered by a pair of BAT VK-60s in mono block(120W), than they sounded with the VK-300x. As I recall, there was no contest.