The Beneteau First 21.7 Swing keel 2004 vs Beneteau Flyer 8.8 Sundeck 2019 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 Flyer 8.8 Sundeck 2019 measures 29,6 feet overall (2019), giving it roughly 8,6 additional feet of deck space compared to the Beneteau First 21.7 Swing keel 2004 at 21,0 feet (2004). Weight tells a clearer story for trailering families: the Beneteau Flyer 8.8 Sundeck 2019 tips the scales at 8 159 lbs — 5 414 lbs less than the Beneteau First 21.7 Swing keel 2004 at 2 745 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 power gap is worth calling out. Rated to 500 hp, the Beneteau Flyer 8.8 Sundeck 2019 has a 489-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.

For family outings this is probably the sharpest distinction between the two. The Beneteau Flyer 8.8 Sundeck 2019 is rated for 9 passengers, while the Beneteau First 21.7 Swing keel 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 Flyer 8.8 Sundeck 2019 could be the deciding factor.

Displacement is where these two sailboats genuinely part ways. The Beneteau Flyer 8.8 Sundeck 2019 displaces 8 159 lbs — a 5 414-lb difference over the Beneteau First 21.7 Swing keel 2004 at 2 745 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.

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 2,3 ft for the Beneteau Flyer 8.8 Sundeck 2019. That 2,8-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 8.8 Sundeck 2019 carries a 500-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. For extended cruising, water capacity matters: the Beneteau Flyer 8.8 Sundeck 2019 carries 27 gallons versus 9 gallons on the Beneteau First 21.7 Swing keel 2004 — a significant advantage on longer passages where watermaker or provisioning stops aren't guaranteed.