When two boats share the same hull type — in this case both the Sweetwater SW 1780 RE3 2009 and the Sweetwater SW 186 F 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?

On paper these two are close siblings in the size department — Sweetwater SW 1780 RE3 2009 at 17,0 ft versus Sweetwater SW 186 F 2013 at 18,0 ft. At 1 853 lbs and 1 879 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 — 60 hp for the Sweetwater SW 1780 RE3 2009 and 60 hp for the Sweetwater SW 186 F 2013. 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 Sweetwater SW 1780 RE3 2009 carries 24 gallons versus 11 gallons in the Sweetwater SW 186 F 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 Sweetwater SW 186 F 2013 is rated for 9 passengers, while the Sweetwater SW 1780 RE3 2009 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sweetwater SW 186 F 2013 could be the deciding factor.

At this size, power-to-weight ratio matters more than outright horsepower. The Sweetwater SW 1780 RE3 2009 comes in at 31 lbs per hp versus 31 lbs per hp for the Sweetwater SW 186 F 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.