Both the Larson LX 620 SF O/B 2012 and the Larson Senza™ 186 Super Sport I/O 2006 are modified-V designs, 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?
Size is the most obvious dividing line here. The Larson Senza™ 186 Super Sport I/O 2006 measures 20,0 feet overall (2006), giving it roughly 3,8 additional feet of deck space compared to the Larson LX 620 SF O/B 2012 at 16,2 feet (2012). Weight tells a clearer story for trailering families: the Larson Senza™ 186 Super Sport I/O 2006 tips the scales at 2 850 lbs - 1 700 lbs less than the Larson LX 620 SF O/B 2012 at 1 150 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 620 SF O/B 2012 carries a rated maximum of 90 hp. Engine data for the Larson Senza™ 186 Super Sport I/O 2006 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Larson Senza™ 186 Super Sport I/O 2006 carries 29 gallons versus 19 gallons in the Larson LX 620 SF 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 6 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 Senza™ 186 Super Sport I/O 2006 at 20,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Larson LX 620 SF O/B 2012 at 16,2 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.