The Odyssey Millennium 1903M 2004 vs Odyssey Millennium II 1704M2 2005 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 Millennium 1903M 2004 at 18,0 ft versus Odyssey Millennium II 1704M2 2005 at 16,0 ft. At 17 lbs and 14 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 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.
Bottom line: The Odyssey Millennium 1903M 2004 and Odyssey Millennium II 1704M2 2005 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.