The Sea Ray 230 Select 2009 is a modified-V design and the Sea Ray 310 Sundancer 2012 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.

Size is the most obvious dividing line here. The Sea Ray 310 Sundancer 2012 measures 31,0 feet overall (2012), giving it roughly 8,0 additional feet of deck space compared to the Sea Ray 230 Select 2009 at 23,0 feet (2009). Weight tells a clearer story for trailering families: the Sea Ray 310 Sundancer 2012 tips the scales at 11 630 lbs - 7 386 lbs less than the Sea Ray 230 Select 2009 at 4 244 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.

Both boats share a closely matched power ceiling - 320 hp for the Sea Ray 230 Select 2009 and 300 hp for the Sea Ray 310 Sundancer 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 Sea Ray 310 Sundancer 2012 carries 125 gallons versus 50 gallons in the Sea Ray 230 Select 2009. 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 Sea Ray 230 Select 2009 is rated for 10 passengers, while the Sea Ray 310 Sundancer 2012 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Ray 230 Select 2009 could be the deciding factor.