The Seasonic was not in sale when I wrote the review.

Plus it is aesthetically greatly...simpler.
I believe that you already know the answer to that question. Measurements are always taken at 20 MHz and with an appropriately modified testing fixture which has the required capacitors installed.
I know that the whole world will hate me for saying that but unfortunately the reliability of Teapo capacitors is just fine. It is a brand which started off as a supplier for Sharp, after all. "All Japanese capacitors" serves no real purpose other than marketing really, it is easy to find Japanese products which are vastly inferior. Not that Nippon Chemi-Con is inferior to Teapo, of course.
...I do find the whole "Japanese" and "Taiwanese" thing a bit..."racist". It is a product, not a flag.