When two boats share the same hull type — in this case both the Bennington 18 SFX 2013 and the Bennington 2275 RL I/O 2013 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 Bennington 2275 RL I/O 2013 measures 25,1 feet overall (2013), giving it roughly 6,7 additional feet of deck space compared to the Bennington 18 SFX 2013 at 18,4 feet (2013). Weight tells a clearer story for trailering families: the Bennington 2275 RL I/O 2013 tips the scales at 3 111 lbs — 1 448 lbs less than the Bennington 18 SFX 2013 at 1 663 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 320 hp, the Bennington 2275 RL I/O 2013 has a 270-hp advantage over the Bennington 18 SFX 2013's 50-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Bennington 2275 RL I/O 2013 carries 59 gallons versus 26 gallons in the Bennington 18 SFX 2013. 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 Bennington 2275 RL I/O 2013 is rated for 11 passengers, while the Bennington 18 SFX 2013 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Bennington 2275 RL I/O 2013 could be the deciding factor.

Both are 2-tube and 3-tube pontoon designs respectively. Tube diameter and gauge affect stability and load capacity — more so than most buyers realize when comparing on paper.