When two boats share the same hull type — in this case both the Premier Boats Boundary Waters 275 Sky Dek 2009 and the Premier Boats Boundary Waters 310 SD 2012 are pontoon designs with aluminum 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 Premier Boats Boundary Waters 310 SD 2012 measures 31,3 feet overall (2012), giving it roughly 4,3 additional feet of deck space compared to the Premier Boats Boundary Waters 275 Sky Dek 2009 at 27,0 feet (2009). At 47 lbs and 49 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.
Both boats share a closely matched power ceiling — 350 hp for the Premier Boats Boundary Waters 275 Sky Dek 2009 and 350 hp for the Premier Boats Boundary Waters 310 SD 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 Premier Boats Boundary Waters 310 SD 2012 carries 25 gallons versus 3 gallons in the Premier Boats Boundary Waters 275 Sky Dek 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 Premier Boats Boundary Waters 275 Sky Dek 2009 is rated for 22 passengers, while the Premier Boats Boundary Waters 310 SD 2012 caps at 20. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Premier Boats Boundary Waters 275 Sky Dek 2009 could be the deciding factor.
One place where both boats are genuinely identical is tube construction: both run 3 aluminum tubes at 27" diameter. That shared spec means stability and buoyancy characteristics are closely matched — the ride difference you'll feel between them comes primarily from deck length, weight distribution, and motor choice.
Bottom line: Choose the Premier Boats Boundary Waters 275 Sky Dek 2009 if your priority is putting more people on the water — it handles 22 passengers and at 27,0 ft it has the deck room to back that rating up comfortably. The Premier Boats Boundary Waters 310 SD 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 20 that costs less to run day-to-day.