Way to TOTALLY ignore all of the differences between the MKZ and the Fusion. Suspension, adaptive LED headlamps, 3.7L V6, wheels, exterior sheet metal, push button transmission, better leather, real wood, rear sunshade, retractable roof, rear heated seats, cooled front seats, THX audio and I'm sure a few more things.
If you don't like those things and don't think it's worth the premium that's fine but don't say stupid things like 'not much'.