I didn’t feel that the MK2 had any sound differences to the MK1. Sure some of the added controls made the ease of access a little bit easier with the MK2 but what really sent me back to the 1 was the buttons. The MK2 has Digitakt style buttons where as the 1 has the round grey buttons which I personally liked a lot better. I listed some other reasons earlier in this post, but it’s just my own opinion. I have owned 4 Octatracks and I like the feel of the MKI better. Try them both and let me know what you think. Thank you for the response!