How can a 40 watt amp outshine a 140 watt amp


My query is; I see $6,000 integrated amplifiers with 40 watts per channel, how is this better than my Pionner Elite SC-35 @ 140 watts per channel, what am I going to hear different, with a, let's say Manley Labs - STINGRAY II? I obviously don't understand the basics involved and if someone could explain or point me in the right direction, I would greatly appreciate it.

I would like to set up a nice two channel analog system. I really can't afford the aforementioned Stingray, what is "out there" in the 2.5 grand range?
mystertee
Thanks Bryon. An intellectually honest way of setting up the experiment would have been to test whether a listener ever gets it right more often than chance. A totally different analysis, and a money losing proposition for him, I suspect.
My objection is simple and to my thinking is the 'trick' to being unable to distinguish betweem 2 amps... the equaliser.... as soon as that is inserted in line? It is MODIFYING the sound of the amplifier it's inline with to be identical, as far as electronic testing is concerned... He cheats by removing that difference.
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