When two boats share the same hull type — in this case both the Riviera Yachts 51 Open Flybridge SII 2011 and the Riviera Yachts 51 Open Flybridge SII 2012 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 51 Open Flybridge SII 2012 measures 58,2 feet overall (2012), giving it roughly 3,5 additional feet of deck space compared to the Riviera Yachts 51 Open Flybridge SII 2011 at 54,7 feet (2011). At 4 806 lbs and 4 806 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

Both boats share a closely matched power ceiling — 825 hp for the Riviera Yachts 51 Open Flybridge SII 2011 and 825 hp for the Riviera Yachts 51 Open Flybridge SII 2012. 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. Both carry nearly identical fuel loads — 977 gal and 977 gal — so range won't be a tiebreaker here.

Both boats are rated for 16 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.