HiBy R3 has a Linux type OS but HiBy R6 has a full Android OS. Bedides the OS's I guess it's a matter of negotiations between the DAP company and the music service providers.

Hi all! This is my first post, so greatings everybody! Now I want to ask what's the difference between M6 and Hiby R3, which is falling in the same category. I find R3 better equiped the M6. Does M6 it's playing DSD, has 2,5 balanced output, customizing theme option? Thanks!