Hello Ptss.
I can't comment on these, as I haven't used them. But I find that industrial equipment is often a superior alternative, because it must work, and work reliably too. Hence Plitron. I also use a CVT (constant voltage transformer) for my turntable, in front of the manufacturer's "special" power supply, for three levels of filtration.
I think that you are correct in your pursuit of pure power, because I think that is the most under-rated factor in audio. My amplifiers see more than a Farad of capacitance, for example.