The Robertson and Caine Moorings 4500 2017 vs Robertson and Caine Moorings 5000 2019 comparison sits squarely in the category of decisions where specs alone won't tell the whole story — intended use, storage, and long-term ownership costs all factor in.
Size is the most obvious dividing line here. The Robertson and Caine Moorings 5000 2019 measures 50,6 feet overall (2019), giving it roughly 5,6 additional feet of deck space compared to the Robertson and Caine Moorings 4500 2017 at 45,0 feet (2017). Weight tells a clearer story for trailering families: the Robertson and Caine Moorings 5000 2019 tips the scales at 57 320 lbs — 25 353 lbs less than the Robertson and Caine Moorings 4500 2017 at 31 967 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 — 45 hp for the Robertson and Caine Moorings 4500 2017 and 57 hp for the Robertson and Caine Moorings 5000 2019. 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 Robertson and Caine Moorings 5000 2019 carries 243 gallons versus 185 gallons in the Robertson and Caine Moorings 4500 2017. 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 Robertson and Caine Moorings 5000 2019 is rated for 15 passengers, while the Robertson and Caine Moorings 4500 2017 caps at 13. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Robertson and Caine Moorings 5000 2019 could be the deciding factor.
Displacement is where these two sailboats genuinely part ways. The Robertson and Caine Moorings 5000 2019 displaces 57 320 lbs — a 25 353-lb difference over the Robertson and Caine Moorings 4500 2017 at 31 967 lbs. That gap separates two entirely different categories of sailing: the heavier boat is built for offshore passage-making and load-carrying, while the lighter hull rewards performance sailing and easier handling in lighter air.
Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Robertson and Caine Moorings 5000 2019 draws 5,2 ft, compared to 4,1 ft for the Robertson and Caine Moorings 4500 2017. That 1,1-foot difference affects which anchorages you can access, which haul-out facilities will take you, and how carefully you need to read the tide tables in shallower cruising grounds.
The Robertson and Caine Moorings 4500 2017 uses Sloop rigging. For auxiliary power the Robertson and Caine Moorings 5000 2019 carries a 57-hp engine against 45 hp on the Robertson and Caine Moorings 4500 2017. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.
For extended cruising, water capacity matters: the Robertson and Caine Moorings 4500 2017 carries 206 gallons versus 185 gallons on the Robertson and Caine Moorings 5000 2019 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.
Bottom line: The Robertson and Caine Moorings 5000 2019 is the offshore and bluewater choice — at 57 320 lbs displacement and 51 ft it has the load capacity, range, and seakeeping for extended passages. The Robertson and Caine Moorings 4500 2017 at 31 967 lbs is the more nimble, accessible option — easier to single-hand and better suited to coastal and inland sailing.