Matching a deep vee Monterey 318SS 2009 against a modified vee Monterey 320SY 2010 means you're likely deciding between two genuinely different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.

Both boats share a closely matched power ceiling — 320 hp for the Monterey 318SS 2009 and 320 hp for the Monterey 320SY 2010. 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 Monterey 318SS 2009 carries 142 gallons versus 18 gallons in the Monterey 320SY 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.