I picked this up for X and I've been disappointed with the screen tearing and frame drops in MP. The image clarity is excellent, however.
Target is having their Buy 2 Get 1 sale, so, I picked up MW for my Pro, and if any X owners are on the fence about making the switch, I recommend going for it. Game supports cross saves, so all my progress on X was immediately available on Pro (you need to have your Activision account linked for this to happen), and the smoother performance and lack of screen tearing has absolutely been worth it. It is blurrier, which sucks, but after a few minutes my eyes got used to it, while I never got used to the screen tearing.