The Skamper looks to have the same tent as a black series unless their website is out of date. Does the 'kids room' come with a floor? The black series version didn't.
MDC kitchen has aust stove/ sink and a bigger slideout kitchen with extra pantry sections, drawers and a bigger slideout table, Staino slide out bbq unit, heavier canvas, drawers under the bed, better elecs, boat loader etc etc.
Not necessarily all plusses or minuses, just differences. My mate gets heaps more gear under his bed with no drawers and would never have them. My wife think the MDC drawers under the bed are the best. I couldn't give a rats either way.
I've got a Cape York and like it. I think the spec level of the Skamper is closer to the MDC Jackson rearfold which is $5k cheaper - quite a bit at your price point.