The Moomba Mobius LS 2008 vs Moomba Outback LS 2005 comparison sits squarely in the category of decisions where specs alone won't tell the whole story: intended use, storage, and long-term ownership costs all factor in.
On paper these two are close siblings in the size department - Moomba Mobius LS 2008 at 21,0 ft versus Moomba Outback LS 2005 at 20,0 ft. Weight tells a clearer story for trailering families: the Moomba Mobius LS 2008 tips the scales at 3 150 lbs - 200 lbs more than the Moomba Outback LS 2005 at 2 950 lbs. That difference is meaningful if you're working within a half-ton or three-quarter-ton truck's tow rating, especially once you factor in a motor, gear, and fuel.
Both boats share a closely matched power ceiling - 325 hp for the Moomba Mobius LS 2008 and 310 hp for the Moomba Outback LS 2005. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Both carry nearly identical fuel loads - 34 gal and 34 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Moomba Mobius LS 2008 is rated for 13 passengers, while the Moomba Outback LS 2005 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Moomba Mobius LS 2008 could be the deciding factor.
Bottom line: Choose the Moomba Mobius LS 2008 if your priority is putting more people on the water - it handles 13 passengers and at 21,0 ft it has the deck room to back that rating up comfortably. The Moomba Outback LS 2005 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.