When two boats share the same hull type — in this case both the Sea Ray 47 Sedan Bridge 2008 and the Sea Ray 520 Sedan Bridge 2013 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?

Size is the most obvious dividing line here. The Sea Ray 520 Sedan Bridge 2013 measures 52,3 feet overall (2013), giving it roughly 47,3 additional feet of deck space compared to the Sea Ray 47 Sedan Bridge 2008 at 5,0 feet (2008). Weight tells a clearer story for trailering families: the Sea Ray 47 Sedan Bridge 2008 tips the scales at 375 lbs — 324 lbs more than the Sea Ray 520 Sedan Bridge 2013 at 51 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 641 hp, the Sea Ray 520 Sedan Bridge 2013 has a 67-hp advantage over the Sea Ray 47 Sedan Bridge 2008'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 2008 carries 53 gallons versus 5 gallons in the Sea Ray 520 Sedan Bridge 2013. 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.