When two boats share the same hull type — in this case both the Moomba Gravity XLV 2011 and the Moomba Mobius LSV 2009 are modified vee designs with fiberglass construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?
On paper these two are close siblings in the size department — Moomba Gravity XLV 2011 at 23,0 ft versus Moomba Mobius LSV 2009 at 21,0 ft. At 36 lbs and 33 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
Both boats share a closely matched power ceiling — 325 hp for the Moomba Gravity XLV 2011 and 325 hp for the Moomba Mobius LSV 2009. 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 — 5 gal and 4 gal — so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Moomba Gravity XLV 2011 is rated for 16 passengers, while the Moomba Mobius LSV 2009 caps at 13. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Moomba Gravity XLV 2011 could be the deciding factor.
Bottom line: Choose the Moomba Gravity XLV 2011 if your priority is putting more people on the water — it handles 16 passengers and at 23,0 ft it has the deck room to back that rating up comfortably. The Moomba Mobius LSV 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 13 that costs less to run day-to-day.