When two boats share the same hull type — in this case both the Bennington 20 SLX 2013 and the Bennington 23 SL I/O 2011 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?

On paper these two are close siblings in the size department — Bennington 20 SLX 2013 at 20,4 ft versus Bennington 23 SL I/O 2011 at 22,3 ft. Weight tells a clearer story for trailering families: the Bennington 23 SL I/O 2011 tips the scales at 2 811 lbs — 1 050 lbs less than the Bennington 20 SLX 2013 at 1 761 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 70 hp, the Bennington 20 SLX 2013 has a 38-hp advantage over the Bennington 23 SL I/O 2011's 32-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 23 SL I/O 2011 carries 62 gallons versus 21 gallons in the Bennington 20 SLX 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 20 SLX 2013 is rated for 23 passengers, while the Bennington 23 SL I/O 2011 caps at 12. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Bennington 20 SLX 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.