When two boats share the same hull type — in this case both the Premier Boats Grand Isle 250 RF 2012 and the Premier Boats S-Series 235 2008 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 — Premier Boats Grand Isle 250 RF 2012 at 25,4 ft versus Premier Boats S-Series 235 2008 at 23,0 ft. Weight tells a clearer story for trailering families: the Premier Boats S-Series 235 2008 tips the scales at 2 725 lbs — 2 430 lbs less than the Premier Boats Grand Isle 250 RF 2012 at 295 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 — 225 hp for the Premier Boats Grand Isle 250 RF 2012 and 225 hp for the Premier Boats S-Series 235 2008. 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 Premier Boats Grand Isle 250 RF 2012 carries 47 gallons versus 29 gallons in the Premier Boats S-Series 235 2008. 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 Premier Boats Grand Isle 250 RF 2012 is rated for 16 passengers, while the Premier Boats S-Series 235 2008 caps at 15. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Premier Boats Grand Isle 250 RF 2012 could be the deciding factor.
One place where both boats are genuinely identical is tube construction: both run 3 aluminum tubes at 25" diameter. That shared spec means stability and buoyancy characteristics are closely matched — the ride difference you'll feel between them comes primarily from deck length, weight distribution, and motor choice.
Bottom line: Choose the Premier Boats Grand Isle 250 RF 2012 if your priority is putting more people on the water — it handles 16 passengers and at 25,4 ft it has the deck room to back that rating up comfortably. The Premier Boats S-Series 235 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 15 that costs less to run day-to-day.