I never compared them as a DAP standalone since I use them as transport fro DAP. But I think if I would only choose one, I would go with the M1, UI is better and I think it's more reactive to. Soundness, I think it's quite close. As for the size, I prefer the A60 better....overall both are a good choice!!!
Which is better as a source for the Mojo? Have you ever streamed Tidal from a phone to the ap60 to Mojo? Im trying to decide which one to get for my mojo as its only use.