When two boats share the same hull type — in this case both the Larson LSR 2100 2013 and the Larson LX 180 S O/B 2013 are deep 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 LSR 2100 2013 at 21,1 ft versus Larson LX 180 S O/B 2013 at 18,5 ft. Weight tells a clearer story for trailering families: the Larson LX 180 S O/B 2013 tips the scales at 2 179 lbs — 2 152 lbs less than the Larson LSR 2100 2013 at 27 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 180 S O/B 2013 tops out at 150 hp. Engine specs for the Larson LSR 2100 2013 aren't listed — confirm with a dealer before selecting an outboard.Both carry nearly identical fuel loads — 3 gal and 3 gal — so range won't be a tiebreaker here.
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.
Bottom line: The Larson LSR 2100 2013 at 21,1 ft is the right call if deck space, comfort, and entertaining are top of your list. The Larson LX 180 S O/B 2013 at 18,5 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.