I was debating between the two as well and I chose the N4 because of the four deck capability and that it looks more professional to me than the Mixtrack Pro. I also figured I would outgrow the Mixtrack too quickly so I wanted to invest in a more professional controller. Functionally though I imagine they’re just about equal apart from the N4 handling four decks and the Mixtrack just two. I find the N4’s unmapped button configuration to be more geared towards effects whereas the Mixtrack is more towards hot cues. Also of note, unless you’ve found a special deal somewhere, the N4 is $250 more than the Mixtrack Pro. All things considered though, I am 100% positive that I made the right decision with the N4.