When two boats share the same hull type — in this case both the Sweetwater SW 1986 RE3 2008 and the Sweetwater SWT 1880 2010 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 1986 RE3 2008 at 19,0 ft versus Sweetwater SWT 1880 2010 at 18,0 ft. At 1 495 lbs and 1 419 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 — 75 hp for the Sweetwater SW 1986 RE3 2008 and 65 hp for the Sweetwater SWT 1880 2010. 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 1986 RE3 2008 carries 24 gallons versus 18 gallons in the Sweetwater SWT 1880 2010. 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 SWT 1880 2010 is rated for 9 passengers, while the Sweetwater SW 1986 RE3 2008 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sweetwater SWT 1880 2010 could be the deciding factor.
Bottom line: Choose the Sweetwater SWT 1880 2010 if your priority is putting more people on the water — it handles 9 passengers and at 18,0 ft it has the deck room to back that rating up comfortably. The Sweetwater SW 1986 RE3 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 8 that costs less to run day-to-day.