The Wellcraft 340 Coastal 2010 vs Wellcraft 390 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.

The power gap is worth calling out. Rated to 750 hp, the Wellcraft 340 Coastal 2010 has a 270-hp advantage over the Wellcraft 390 2004's 480-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Wellcraft 390 2004 carries 394 gallons versus 382 gallons in the Wellcraft 340 Coastal 2010. 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 Wellcraft 340 Coastal 2010 is rated for 10 passengers, while the Wellcraft 390 2004 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Wellcraft 340 Coastal 2010 could be the deciding factor.