When two boats share the same hull type — in this case both the Larson LXi 288 I/O 2008 and the Larson SEi 180 Ski Fish I/O 2007 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?
Size is the most obvious dividing line here. The Larson LXi 288 I/O 2008 measures 29,0 feet overall (2008), giving it roughly 12,0 additional feet of deck space compared to the Larson SEi 180 Ski Fish I/O 2007 at 17,0 feet (2007). Weight tells a clearer story for trailering families: the Larson LXi 288 I/O 2008 tips the scales at 6 225 lbs — 5 960 lbs more than the Larson SEi 180 Ski Fish I/O 2007 at 265 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.
The power gap is worth calling out. Rated to 420 hp, the Larson LXi 288 I/O 2008 has a 195-hp advantage over the Larson SEi 180 Ski Fish I/O 2007's 225-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Larson LXi 288 I/O 2008 is rated for 8 passengers, while the Larson SEi 180 Ski Fish I/O 2007 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson LXi 288 I/O 2008 could be the deciding factor.
Bottom line: Choose the Larson LXi 288 I/O 2008 if your priority is putting more people on the water — it handles 8 passengers and at 29,0 ft it has the deck room to back that rating up comfortably. The Larson SEi 180 Ski Fish I/O 2007 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.