I think I know where
@Magnifico found the M200 measurements came from, it's on the SMSL website.
If I compare the
@amirm measurements of the M300 to those available of the M200 on the SMSL site, the M200 has + -1db less for the SINAD and a little more noise below 1khz. Here I find that it is inaudible as a difference.
However the dynamic range and the Snr are identical
At first I wanted the M300, but it was difficult to get it (Canada) if not from the USA with customs fees, so I decided to buy the M200, even if it is more expensive I do not regret it as I already wrote, because it has in addition a much better Bluetooth (UAT, LDAC, APTX-HD ...) and also a connection for SPDIF much more practical ... now I look forward to receiving it and plug it in.