Looking at the Mama Mia, it is definitely not the same plane as the Big Dirty Birdy 2+2 (
http://www.bridiairplanes.com/hangar/bigdirtybirdy.html ), as was mentioned previously. The wing is much lower aspect ratio, the span is 13" greater on the DB 2+2 and area is a bit more, too. Fuse also looks fatter on the MM from that pic...
Mark