When two boats share the same hull type — in this case both the Alumacraft 1236 2013 and the Alumacraft Riveted Jon 1648 (15 & 20) 2011 are flat 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 Alumacraft Riveted Jon 1648 (15 & 20) 2011 measures 16,0 feet overall (2011), giving it roughly 4,0 additional feet of deck space compared to the Alumacraft 1236 2013 at 12,0 feet (2013). Weight tells a clearer story for trailering families: the Alumacraft Riveted Jon 1648 (15 & 20) 2011 tips the scales at 285 lbs — 160 lbs less than the Alumacraft 1236 2013 at 125 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 30 hp, the Alumacraft Riveted Jon 1648 (15 & 20) 2011 has a 20-hp advantage over the Alumacraft 1236 2013's 10-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

For family outings this is probably the sharpest distinction between the two. The Alumacraft Riveted Jon 1648 (15 & 20) 2011 is rated for 5 passengers, while the Alumacraft 1236 2013 caps at 3. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Alumacraft Riveted Jon 1648 (15 & 20) 2011 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Alumacraft Riveted Jon 1648 (15 & 20) 2011 comes in at 10 lbs per hp versus 13 lbs per hp for the Alumacraft 1236 2013. The lower the ratio the more explosive the acceleration — meaningful on a short RIB where bursts of speed, quick planing, and agility in surf or tight waterways define the experience.