When two boats share the same hull type — in this case both the Riviera Yachts 45 Open Flybridge 2010 and the Riviera Yachts M470 Sport Cruiser 2010 are modified 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?

On paper these two are close siblings in the size department — Riviera Yachts 45 Open Flybridge 2010 at 48,3 ft versus Riviera Yachts M470 Sport Cruiser 2010 at 47,0 ft. Weight tells a clearer story for trailering families: the Riviera Yachts 45 Open Flybridge 2010 tips the scales at 394 lbs — 372 lbs more than the Riviera Yachts M470 Sport Cruiser 2010 at 22 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 670 hp, the Riviera Yachts 45 Open Flybridge 2010 has a 245-hp advantage over the Riviera Yachts M470 Sport Cruiser 2010's 425-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Riviera Yachts 45 Open Flybridge 2010 carries 608 gallons versus 325 gallons in the Riviera Yachts M470 Sport Cruiser 2010. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 14 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.