Other reviewers don’t share his opinion. He sells both lines, why would he tell current and potential customers that the cheaper option sounds better? He left out the fact that the MU2 has a preamp section and doubles as a Roon Core and Endpoint.
Grimm MU1/Mola Mola Tambaqui combo vs. Grimm MU2
Here is a great video discussing the very popular question of which is better: the Grimm MU1 streamer with the Mola Mola Tambaqui DAC or the Grimm MU2 with built-in DAC?