When two boats share the same hull type — in this case both the EdgeWater 170CC 2009 and the EdgeWater 318CC 2011 are deep vee designs with fiberglass construction — 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 EdgeWater 318CC 2011 measures 31,8 feet overall (2011), giving it roughly 15,8 additional feet of deck space compared to the EdgeWater 170CC 2009 at 16,0 feet (2009). At 17 lbs and 65 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 700 hp, the EdgeWater 318CC 2011 has a 585-hp advantage over the EdgeWater 170CC 2009's 115-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the EdgeWater 170CC 2009 carries 32 gallons versus 3 gallons in the EdgeWater 318CC 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 EdgeWater 318CC 2011 is rated for 12 passengers, while the EdgeWater 170CC 2009 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the EdgeWater 318CC 2011 could be the deciding factor.