When two boats share the same hull type — in this case both the Navigator Yachts Navigator 4500 2013 and the Navigator Yachts Navigator 5100 2010 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 Navigator Yachts Navigator 5100 2010 measures 51,7 feet overall (2010), giving it roughly 5,7 additional feet of deck space compared to the Navigator Yachts Navigator 4500 2013 at 46,0 feet (2013). At 37 lbs and 5 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.

The Navigator Yachts Navigator 5100 2010 tops out at 500 hp. Engine specs for the Navigator Yachts Navigator 4500 2013 aren't listed — confirm with a dealer before selecting an outboard.Both carry nearly identical fuel loads — 5 gal and 6 gal — so range won't be a tiebreaker here.

For family outings this is probably the sharpest distinction between the two. The Navigator Yachts Navigator 5100 2010 is rated for 15 passengers, while the Navigator Yachts Navigator 4500 2013 caps at 14. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Navigator Yachts Navigator 5100 2010 could be the deciding factor.