When two boats share the same hull type — in this case both the South Bay 520CR TT I/O 2010 and the South Bay 724CR 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?
Size is the most obvious dividing line here. The South Bay 724CR 2013 measures 25,2 feet overall (2013), giving it roughly 3,8 additional feet of deck space compared to the South Bay 520CR TT I/O 2010 at 21,4 feet (2010). Weight tells a clearer story for trailering families: the South Bay 724CR 2013 tips the scales at 2 625 lbs — 2 386 lbs less than the South Bay 520CR TT I/O 2010 at 239 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 — 135 hp for the South Bay 520CR TT I/O 2010 and 150 hp for the South Bay 724CR 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 South Bay 520CR TT I/O 2010 is rated for 14 passengers, while the South Bay 724CR 2013 caps at 12. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the South Bay 520CR TT I/O 2010 could be the deciding factor.
Bottom line: Choose the South Bay 520CR TT I/O 2010 if your priority is putting more people on the water — it handles 14 passengers and at 21,4 ft it has the deck room to back that rating up comfortably. The South Bay 724CR 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 12 that costs less to run day-to-day.