When two boats share the same hull type — in this case both the Riviera Yachts 63 Enclosed Flybridge 2012 and the Riviera Yachts 78 Motor Yacht 2011 are deep vee 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 Riviera Yachts 78 Motor Yacht 2011 measures 78,0 feet overall (2011), giving it roughly 13,6 additional feet of deck space compared to the Riviera Yachts 63 Enclosed Flybridge 2012 at 64,4 feet (2012). Weight tells a clearer story for trailering families: the Riviera Yachts 78 Motor Yacht 2011 tips the scales at 13 426 lbs — 12 754 lbs less than the Riviera Yachts 63 Enclosed Flybridge 2012 at 672 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 — 1 015 hp for the Riviera Yachts 63 Enclosed Flybridge 2012 and 1 015 hp for the Riviera Yachts 78 Motor Yacht 2011. 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. Fuel capacity breaks the other way: the Riviera Yachts 78 Motor Yacht 2011 carries 2 117 gallons versus 1 731 gallons in the Riviera Yachts 63 Enclosed Flybridge 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

For family outings this is probably the sharpest distinction between the two. The Riviera Yachts 78 Motor Yacht 2011 is rated for 23 passengers, while the Riviera Yachts 63 Enclosed Flybridge 2012 caps at 18. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Riviera Yachts 78 Motor Yacht 2011 could be the deciding factor.