When two boats share the same hull type — in this case both the Sweetwater SW 1770 2013 and the Sweetwater SW 1880 FC 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 1770 2013 at 17,0 ft versus Sweetwater SW 1880 FC 2013 at 18,3 ft. Weight tells a clearer story for trailering families: the Sweetwater SW 1880 FC 2013 tips the scales at 2 058 lbs — 247 lbs less than the Sweetwater SW 1770 2013 at 1 811 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.
Both boats share a closely matched power ceiling — 60 hp for the Sweetwater SW 1770 2013 and 65 hp for the Sweetwater SW 1880 FC 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.
For family outings this is probably the sharpest distinction between the two. The Sweetwater SW 1880 FC 2013 is rated for 9 passengers, while the Sweetwater SW 1770 2013 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sweetwater SW 1880 FC 2013 could be the deciding factor.
Bottom line: Choose the Sweetwater SW 1880 FC 2013 if your priority is putting more people on the water — it handles 9 passengers and at 18,3 ft it has the deck room to back that rating up comfortably. The Sweetwater SW 1770 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 8 that costs less to run day-to-day.