When two boats share the same hull type — in this case both the Larson LX 850 I/O 2012 and the Larson LX 860 O/B 2012 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 850 I/O 2012 at 18,4 ft versus Larson LX 860 O/B 2012 at 18,5 ft. At 245 lbs and 178 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 — 135 hp for the Larson LX 850 I/O 2012 and 150 hp for the Larson LX 860 O/B 2012. 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. Fuel capacity breaks the other way: the Larson LX 850 I/O 2012 carries 19 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.