The Odyssey 318C 2006 vs Odyssey Millennium II 1704M2 2004 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.

On paper these two are close siblings in the size department — Odyssey 318C 2006 at 18,0 ft versus Odyssey Millennium II 1704M2 2004 at 16,0 ft. Weight tells a clearer story for trailering families: the Odyssey 318C 2006 tips the scales at 166 lbs — 152 lbs more than the Odyssey Millennium II 1704M2 2004 at 14 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.

The Odyssey 318C 2006 carries a rated maximum of 70 hp. Engine data for the Odyssey Millennium II 1704M2 2004 wasn't available in our records — check the manufacturer's spec sheet before sizing a motor.

Both boats are rated for 9 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.

The Odyssey 318C 2006 is an inflatable design — lighter, easier to store, and quicker to launch from a beach or dock without a slipway. The Odyssey Millennium II 1704M2 2004 is a rigid hull, which typically offers a more confident ride in chop and easier maintenance over the long term.