I crossshopped those 3 brands when upgrading my comps, though they were 6.5's, not 4's. To my ear, the MB Q's were flat with a natural sound. Focal Utopias were a little brighter with more character. The CDT Eurosports seemed to have a smoother, richer, fuller sound, which is more pleasing to me, so I picked up the Eurosports. All sound awesome and the differences were minor, but significant. I think all three are great and would recommend them each to different people.