When two boats share the same hull type — in this case both the Riviera Yachts 47 Enclosed Flybridge SII 2010 and the Riviera Yachts 47 Open Flybridge SII 2009 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 47 Enclosed Flybridge SII 2010 at 49,1 ft versus Riviera Yachts 47 Open Flybridge SII 2009 at 49,0 ft. At 432 lbs and 432 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 — 715 hp for the Riviera Yachts 47 Enclosed Flybridge SII 2010 and 715 hp for the Riviera Yachts 47 Open Flybridge SII 2009. 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.

For family outings this is probably the sharpest distinction between the two. The Riviera Yachts 47 Open Flybridge SII 2009 is rated for 15 passengers, while the Riviera Yachts 47 Enclosed Flybridge SII 2010 caps at 14. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Riviera Yachts 47 Open Flybridge SII 2009 could be the deciding factor.