When two boats share the same hull type — in this case both the Larson LX 860 O/B 2012 and the Larson SEi 180 LX 2009 are modified vee designs with composite 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 — Larson LX 860 O/B 2012 at 18,5 ft versus Larson SEi 180 LX 2009 at 17,0 ft. Weight tells a clearer story for trailering families: the Larson SEi 180 LX 2009 tips the scales at 2 365 lbs — 2 187 lbs less than the Larson LX 860 O/B 2012 at 178 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 Larson LX 860 O/B 2012 carries a rated maximum of 150 hp. Engine data for the Larson SEi 180 LX 2009 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Larson SEi 180 LX 2009 carries 23 gallons versus 3 gallons in the Larson LX 860 O/B 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 8 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.