The people that made these claim obviously believes in fairies.
Anyway, statement or claim made by Cheap Fi Man should be taken with a grain of salt. First example, a lot more people prefers the HE-1 over the Shangri La Sr. After hearing both, I can concur as I have heard both at a dedicated headphone store. In regards to Susvara reaching the resolution of the 009, hahah that's Crap Fi Man marketing and fanboi at work.
As an advice, trust only your own hearing. Everyone hearing preference is different. Some people prefer 007, some prefer 009. Regardless how good something sounds poor build quality has no place in my book to commend 4-6k and above.
It would be very hard to find someone with the financial backing to get all these expensive gear to properly test and compare them. Not to mention even if you have funds, some of these uber summit fi stuff like the DIY T2 are unobtaniumly rare.
Which is likely the reason why stuff like this aren't discuss or bought to light often.