Takstar has made no claims about ML850, other than the information provided at
https://en.takstar.com/product/type/3241.html
And that page contains a lot of questionable information - how can ML850 support sample rate of 24/96, if it doesn't support anything faster that APTX, which is limited to 16/44?
Also, I've never seen a Bluetooth headphone specify S/N and THD like ML850 - and the numbers listed are pretty bad...
I'd be happy with ML850 sounding like GM200 or Pro 82 - they both sound great.
In the end, it all depends on who tuned ML850 - if it's the same engineer who tuned Pro 82/GM200, we will have one of best sounding (if not
the best sounding) Bluetooth headphones on the market.
There is no need to cut microdetails in treble too much - APTX has bandwidth of 352kbps, enough for Youtube (128kbps) and most streaming services (250-320Kbps).