The Beneteau First 21.7 Swing keel 2004 vs Beneteau Flyer 6 Sundeck 2023 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 — Beneteau First 21.7 Swing keel 2004 at 21,0 ft versus Beneteau Flyer 6 Sundeck 2023 at 19,7 ft. At 2 745 lbs and 2 757 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.

The power gap is worth calling out. Rated to 140 hp, the Beneteau Flyer 6 Sundeck 2023 has a 129-hp advantage over the Beneteau First 21.7 Swing keel 2004's 11-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load.

Both boats are rated for 6 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.

Both boats sit in a similar displacement bracket — 2 745 lbs for the Beneteau First 21.7 Swing keel 2004 and 2 757 lbs for the Beneteau Flyer 6 Sundeck 2023. Comparable displacement means broadly similar seakeeping behaviour and load capacity, though hull form and ballast ratio will still produce noticeably different sailing characteristics.

Draft is a practical consideration that many buyers underestimate until they're already at the marina. The Beneteau First 21.7 Swing keel 2004 draws 5,1 ft, compared to 2,7 ft for the Beneteau Flyer 6 Sundeck 2023. That 2,4-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 Swing keel 2004 uses Sloop rigging. For auxiliary power the Beneteau Flyer 6 Sundeck 2023 carries a 140-hp engine against 11 hp on the Beneteau First 21.7 Swing keel 2004. Motoring range and ability to punch through a foul current or enter a tight marina under power will favour the more powerful installation.

The Beneteau First 21.7 Swing keel 2004 is trailerable, giving it a significant lifestyle advantage for sailors who want to move between lakes, rivers, and coastal waters without committing to a marina slip.