The Stamas 345 Aegean Outboard 2012 vs Stamas Yacht 390 Aegean 2015 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 600 hp, the Stamas 345 Aegean Outboard 2012 has a 300-hp advantage over the Stamas Yacht 390 Aegean 2015's 300-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Stamas 345 Aegean Outboard 2012 carries 316 gallons versus 41 gallons in the Stamas Yacht 390 Aegean 2015. 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 Stamas 345 Aegean Outboard 2012 is rated for 12 passengers, while the Stamas Yacht 390 Aegean 2015 caps at 11. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Stamas 345 Aegean Outboard 2012 could be the deciding factor.