The Sea Ray 340 Sundancer 2008 is a deep-V design and the Sea Ray 390 Sedan Bridge 2011 is a semi-displacement 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 390 Sedan Bridge 2011 measures 40,8 feet overall (2011), giving it roughly 3,8 additional feet of deck space compared to the Sea Ray 340 Sundancer 2008 at 37,0 feet (2008). Weight tells a clearer story for trailering families: the Sea Ray 390 Sedan Bridge 2011 tips the scales at 22 000 lbs - 6 500 lbs less than the Sea Ray 340 Sundancer 2008 at 15 500 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 - 375 hp for the Sea Ray 340 Sundancer 2008 and 375 hp for the Sea Ray 390 Sedan Bridge 2011. 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 390 Sedan Bridge 2011 carries 300 gallons versus 225 gallons in the Sea Ray 340 Sundancer 2008. 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 390 Sedan Bridge 2011 is rated for 12 passengers, while the Sea Ray 340 Sundancer 2008 caps at 11. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea Ray 390 Sedan Bridge 2011 could be the deciding factor.