When two boats share the same hull type — in this case both the Sea Ray 47 Sedan Bridge 2009 and the Sea Ray 520 Sedan Bridge 2011 are semi displacement designs with fiberglass 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 — Sea Ray 47 Sedan Bridge 2009 at 50,7 ft versus Sea Ray 520 Sedan Bridge 2011 at 52,3 ft. Weight tells a clearer story for trailering families: the Sea Ray 47 Sedan Bridge 2009 tips the scales at 375 lbs — 333 lbs more than the Sea Ray 520 Sedan Bridge 2011 at 42 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.

The power gap is worth calling out. Rated to 764 hp, the Sea Ray 520 Sedan Bridge 2011 has a 190-hp advantage over the Sea Ray 47 Sedan Bridge 2009's 574-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sea Ray 47 Sedan Bridge 2009 carries 53 gallons versus 5 gallons in the Sea Ray 520 Sedan Bridge 2011. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 15 passengers — a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.