USB
USB Audio 2.0 Full Compliance
– PCM to 32 bit/768kHz
– DoP to DSD256
– Native DSD to DSD512
AES3
– PCM to 24bit/192kHz
– DoP to DSD64
Prior to G4 AES was, in Antipodes opinion the preferred connection.
With G4 and the introduction of isolation, regeneration, and reclocking of USB it is a much harder task for us to differentiate.
Use whatever sounds best to you, that suits your system, ears, source material, the only shortfall of AES is if you want to listen to higher than 192 or DSD64.