The Moomba Mobius LS 2004 vs Moomba Outback LS 2006 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.
The power gap is worth calling out. Rated to 340 hp, the Moomba Outback LS 2006 has a 30-hp advantage over the Moomba Mobius LS 2004's 310-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. 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 Outback LS 2006 is rated for 13 passengers, while the Moomba Mobius LS 2004 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Moomba Outback LS 2006 could be the deciding factor.
Bottom line: Choose the Moomba Outback LS 2006 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 Mobius LS 2004 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.