When two boats share the same hull type — in this case both the South Bay 420CR B 2013 and the South Bay 620CR 2009 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 420CR B 2013 measures 20,6 feet overall (2013), giving it roughly 18,6 additional feet of deck space compared to the South Bay 620CR 2009 at 2,0 feet (2009). Weight tells a clearer story for trailering families: the South Bay 620CR 2009 tips the scales at 195 lbs — 174 lbs less than the South Bay 420CR B 2013 at 21 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 — 115 hp for the South Bay 420CR B 2013 and 115 hp for the South Bay 620CR 2009. 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 620CR 2009 is rated for 10 passengers, while the South Bay 420CR B 2013 caps at 1. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the South Bay 620CR 2009 could be the deciding factor.
Bottom line: Choose the South Bay 620CR 2009 if your priority is putting more people on the water — it handles 10 passengers and at 2,0 ft it has the deck room to back that rating up comfortably. The South Bay 420CR B 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 1 that costs less to run day-to-day.