The Triton Boats 1231 SFB 2005 vs Triton Boats 1648 SFB 2008 comparison sits squarely in the category of decisions where specs alone won't tell the whole story: intended use, storage, and long-term ownership costs all factor in.
The power gap is worth calling out. Rated to 35 hp, the Triton Boats 1648 SFB 2008 has a 29-hp advantage over the Triton Boats 1231 SFB 2005's 6-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 Triton Boats 1648 SFB 2008 is rated for 4 passengers, while the Triton Boats 1231 SFB 2005 caps at 2. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Triton Boats 1648 SFB 2008 could be the deciding factor.
Bottom line: Choose the Triton Boats 1648 SFB 2008 if your priority is putting more people on the water - it handles 4 passengers and at 15,0 ft it has the deck room to back that rating up comfortably. The Triton Boats 1231 SFB 2005 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 2 that costs less to run day-to-day.