The Beneteau Antares 9.80 2008 vs Beneteau First 21.7 S 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.

Size is the most obvious dividing line here. The Beneteau Antares 9.80 2008 measures 32,0 feet overall (2008), giving it roughly 11,9 additional feet of deck space compared to the Beneteau First 21.7 S 2004 at 20,1 feet (2004). Weight tells a clearer story for trailering families: the Beneteau Antares 9.80 2008 tips the scales at 11 762 lbs — 9 018 lbs more than the Beneteau First 21.7 S 2004 at 2 744 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 Beneteau First 21.7 S 2004 tops out at 20 hp. Engine specs for the Beneteau Antares 9.80 2008 aren't listed — confirm with a dealer before selecting an outboard.Fuel capacity breaks the other way: the Beneteau Antares 9.80 2008 carries 169 gallons versus 8 gallons in the Beneteau First 21.7 S 2004. 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 Beneteau Antares 9.80 2008 is rated for 9 passengers, while the Beneteau First 21.7 S 2004 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Beneteau Antares 9.80 2008 could be the deciding factor.

The Beneteau First 21.7 S 2004 has a documented displacement of 2 744 lbs. Displacement data wasn't available for the other boat in this comparison.

Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Beneteau First 21.7 S 2004 draws 6,0 ft, compared to 2,0 ft for the Beneteau Antares 9.80 2008. That 4,0-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 Beneteau First 21.7 S 2004 has a documented auxiliary engine of 20 hp.

For extended cruising, water capacity matters: the Beneteau Antares 9.80 2008 carries 58 gallons versus 11 gallons on the Beneteau First 21.7 S 2004 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.