The Larson 206 Senza 2010 is a modified-V design and the Larson LX 185 S I/O 2013 is a deep-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
On paper these two are close siblings in the size department - Larson 206 Senza 2010 at 20,5 ft versus Larson LX 185 S I/O 2013 at 18,7 ft. Weight tells a clearer story for trailering families: the Larson 206 Senza 2010 tips the scales at 3 050 lbs - 1 010 lbs more than the Larson LX 185 S I/O 2013 at 2 040 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 300 hp, the Larson 206 Senza 2010 has a 165-hp advantage over the Larson LX 185 S I/O 2013's 135-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Larson 206 Senza 2010 carries 35 gallons versus 19 gallons in the Larson LX 185 S I/O 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
For family outings this is probably the sharpest distinction between the two. The Larson 206 Senza 2010 is rated for 10 passengers, while the Larson LX 185 S I/O 2013 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Larson 206 Senza 2010 could be the deciding factor.
Bottom line: Choose the Larson 206 Senza 2010 if your priority is putting more people on the water - it handles 10 passengers and at 20,5 ft it has the deck room to back that rating up comfortably. The Larson LX 185 S I/O 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.