I have both of these units, and find myself using the Analog Four MkII far more. The Digitone is good, it’s compact, and it has a different flavour from my other gear, but the A4MkII just sounds very, very pleasing to my ear. The Digitone offers more voices, which is super useful, but I find I always want to effect the master out in order to warm up the sound. I think it will simply come down to your preference for the sound of one versus the other. Best of luck!