Mind Movies 4.0 is a creation kit that allows you to create your own mind movie (you may use your own photos and choice of music tracks) that can be as specific to your life as you make them. Some people prefer to make their own Mind Movies filled with their own personal goals which is why we developed the Mind Movies creation kit to make the visualization process easy.
Mind Movies Matrix is a product created by Morry, a credible brain entrainment engineer who added his technology to premade mindmovies on 4 specific mindmovies (Money, Health, Perfect Partner and Relationships) to help make changes to the brain and change limiting beliefs that may be holding anyone back.
It really depends on your preference but both programs are compatible, meaning you can use both at the same time. You may want to experience more than one MMM at a time, or in a row, or even the same one looped multiple times. If this is the case then feel free to do so as the more exposure the more retraining to a better way you get.