When two boats share the same hull type — in this case both the Pursuit OS 345 2012 and the Pursuit S 310 2009 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 Pursuit OS 345 2012 measures 36,3 feet overall (2012), giving it roughly 5,2 additional feet of deck space compared to the Pursuit S 310 2009 at 31,2 feet (2009). Weight tells a clearer story for trailering families: the Pursuit S 310 2009 tips the scales at 8 873 lbs — 7 278 lbs less than the Pursuit OS 345 2012 at 1 595 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 700 hp, the Pursuit OS 345 2012 has a 200-hp advantage over the Pursuit S 310 2009's 500-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Pursuit OS 345 2012 carries 34 gallons versus 26 gallons in the Pursuit S 310 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 Pursuit OS 345 2012 is rated for 11 passengers, while the Pursuit S 310 2009 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Pursuit OS 345 2012 could be the deciding factor.