The Nacra Sailing Nacra F18 Infusion 2008 vs Nacra Sailing Nacra Inter 20 1998 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.
For family outings this is probably the sharpest distinction between the two. The Nacra Sailing Nacra Inter 20 1998 is rated for 6 passengers, while the Nacra Sailing Nacra F18 Infusion 2008 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Nacra Sailing Nacra Inter 20 1998 could be the deciding factor.
The Nacra Sailing Nacra F18 Infusion 2008 has a documented displacement of 397 lbs. Displacement data wasn't available for the other boat in this comparison.
The Nacra Sailing Nacra F18 Infusion 2008 is rigged as a Sloop while the Nacra Sailing Nacra Inter 20 1998 carries fractional_rig_sloop rigging — a meaningful difference in sail handling complexity, upwind performance, and the size of crew you'll need to work the boat comfortably.
Both the Nacra Sailing Nacra F18 Infusion 2008 and Nacra Sailing Nacra Inter 20 1998 are listed as trailerable, which opens up the freedom to explore different sailing grounds without paying for a permanent berth.
Bottom line: The Nacra Sailing Nacra F18 Infusion 2008 and Nacra Sailing Nacra Inter 20 1998 are closely matched on paper. A sea trial on both in representative conditions is the only reliable way to find which one suits your sailing style, home port, and intended cruising ground.