Comparing a Yamaha s301bl to a rega elicit mk5 - a/b on some paradigm 800fs and they sound the exact same. Looking at the specs it makes sense - I don’t know why I’d ever use the full wattage of even the Yamaha without getting hearing damage and the THD being 0.019% vs 0.004% makes no functional difference. Are high end amps the new snake oil? What exactly are you getting for 10x the price here (besides the rega having less features and the rega brand name?)
If you can’t hear the difference, don’t worry about it and count your blessings. That $300 Yamaha amp is all you’ll ever need.
Me, I’ll just continue to enjoy my PrimaLuna, Krell, and McIntosh amps.
Everybody happy!