Both the Larson 258 LXi 2010 and the Larson LXi 238 I/O 2012 are modified-V designs, the first built in fibreglass and the second in composite, so 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 - Larson 258 LXi 2010 at 25,5 ft versus Larson LXi 238 I/O 2012 at 23,5 ft. Weight tells a clearer story for trailering families: the Larson 258 LXi 2010 tips the scales at 4 750 lbs - 310 lbs more than the Larson LXi 238 I/O 2012 at 4 440 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 425 hp, the Larson 258 LXi 2010 has a 165-hp advantage over the Larson LXi 238 I/O 2012's 260-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 56 gal and 56 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Larson 258 LXi 2010 is rated for 12 passengers, while the Larson LXi 238 I/O 2012 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson 258 LXi 2010 could be the deciding factor.
Bottom line: Choose the Larson 258 LXi 2010 if your priority is putting more people on the water - it handles 12 passengers and at 25,5 ft it has the deck room to back that rating up comfortably. The Larson LXi 238 I/O 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.