I finally contacted with manufacturer of the ESC based on VESC6 from Taobao. He obviously does it for fun and up skills not for commercial benefit.
He kindly offered me this controller for any price (I call it for free) if I do power tests. I’m not the guy who can do it right.
So maybe someone with experience in testing controllers and some reputation here will be happy to do it for science and of course share results with us?