Both the Bayliner 180 OB 2011 and the Bayliner 266 DIS 2010 are deep-V designs, both built in fibreglass, 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 Bayliner 266 DIS 2010 measures 25,6 feet overall (2010), giving it roughly 7,6 additional feet of deck space compared to the Bayliner 180 OB 2011 at 18,0 feet (2011). Weight tells a clearer story for trailering families: the Bayliner 266 DIS 2010 tips the scales at 6 354 lbs - 4 476 lbs less than the Bayliner 180 OB 2011 at 1 878 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 Bayliner 266 DIS 2010 has a 175-hp advantage over the Bayliner 180 OB 2011's 125-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Bayliner 266 DIS 2010 carries 81 gallons versus 23 gallons in the Bayliner 180 OB 2011. 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 Bayliner 266 DIS 2010 is rated for 10 passengers, while the Bayliner 180 OB 2011 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Bayliner 266 DIS 2010 could be the deciding factor.