They all use about the same stuff. We don't have that problem. The Transcendent OTL uses a completely different circuit than anything else in the world. That is why it sounds better. Arguments have been made over the years concerning which parameters have the greatest sonic impact and therefore should be optimized.
Many amplifiers exhibit poor measured performance but produce excellent sound.
After years of experimentation, a Transcendent philosophy has been developed which, of course, differs from mainstream thought. You can't come up with new ideas if you follow the crowd. Virtually all measurements are static in nature. A signal is injected and the results are measured. We think this can only take a design so far as it has a severe limitation.