The Jeanneau Sun Odyssey 379 2011 vs Jeanneau Sun Odyssey 409 2010 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 Jeanneau Sun Odyssey 409 2010 measures 40,6 feet overall (2010), giving it roughly 3,4 additional feet of deck space compared to the Jeanneau Sun Odyssey 379 2011 at 37,2 feet (2011). Weight tells a clearer story for trailering families: the Jeanneau Sun Odyssey 409 2010 tips the scales at 17 328 lbs — 2 557 lbs less than the Jeanneau Sun Odyssey 379 2011 at 14 771 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 — 29 hp for the Jeanneau Sun Odyssey 379 2011 and 40 hp for the Jeanneau Sun Odyssey 409 2010. 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 Jeanneau Sun Odyssey 409 2010 carries 53 gallons versus 34 gallons in the Jeanneau Sun Odyssey 379 2011. 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 Jeanneau Sun Odyssey 409 2010 is rated for 12 passengers, while the Jeanneau Sun Odyssey 379 2011 caps at 11. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Jeanneau Sun Odyssey 409 2010 could be the deciding factor.
Displacement is where these two sailboats genuinely part ways. The Jeanneau Sun Odyssey 409 2010 displaces 17 328 lbs — a 2 557-lb difference over the Jeanneau Sun Odyssey 379 2011 at 14 771 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.
Both boats draw a similar depth — 6,5 ft and 6,1 ft respectively. Marina access and anchorage options should be broadly equivalent between the two.
The Jeanneau Sun Odyssey 379 2011 uses Sloop rigging. For auxiliary power the Jeanneau Sun Odyssey 409 2010 carries a 40-hp engine against 29 hp on the Jeanneau Sun Odyssey 379 2011. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.
Hull speed is rated at 8,1 knots for the Jeanneau Sun Odyssey 409 2010 and 7,8 knots for the Jeanneau Sun Odyssey 379 2011. For extended cruising, water capacity matters: the Jeanneau Sun Odyssey 409 2010 carries 87 gallons versus 53 gallons on the Jeanneau Sun Odyssey 379 2011 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.
Bottom line: The Jeanneau Sun Odyssey 409 2010 is the offshore and bluewater choice — at 17 328 lbs displacement and 41 ft it has the load capacity, range, and seakeeping for extended passages. The Jeanneau Sun Odyssey 379 2011 at 14 771 lbs is the more nimble, accessible option — easier to single-hand and better suited to coastal and inland sailing.