i had a 2004 Mobius LSV, im pretty sure they made no changes between the 04-05 models, the wake was ok.... on top of stock ballast i would throw an extra 500lb bag in the bow and it should be pretty decent.
when they change the beam, length, and pretty much did an overhaul for the 2006-2008 models i bought the 2006 and it throws a sick wake, add a 500lb ski locker bag in the bow and it one of the best wakes i've riden behind. i would compare it to all the "big dogs"
now i believe the maristar 210 is the same platform for alot of the X-series. My buddy that i used to ride on almost daily basis had a 2004 X-10 which im pretty sure was built off the 210. It was a nice clean wake, i would probably go with this boat if it were the same price, its better for seating, the wake is cleaner, there are little amenities that are a lil better.
you could probably get the wake in the moomba to be more "poppy" but the mastercraft will be smoother. if you had to decide on an 06-08 mobius model i would go with that, but those years im leaning towards the mastercraft even though im a HUGE moomba supporter.
also make sure which boat has what kinda options, little things def count like: auto ballast, perfect pass, heater, etc.