The X-Yachts ATLANTIS 2012 vs X-Yachts X-43 Sport Sport 2003 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 X-Yachts X-43 Sport Sport 2003 tops out at 40 hp. Engine specs for the X-Yachts ATLANTIS 2012 aren't listed - confirm with a dealer before selecting an outboard.
Both boats are rated for 12 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.
The X-Yachts X-43 Sport Sport 2003 has a documented displacement of 18 960 lbs. Displacement data wasn't available for the other boat in this comparison.
The X-Yachts X-43 Sport Sport 2003 has a documented auxiliary engine of 40 hp.
Bottom line: The X-Yachts X-43 Sport Sport 2003 at 42,5 ft offers more living space, greater range, and a more substantial offshore capability. The X-Yachts ATLANTIS 2012 at 40,0 ft is the easier, lower-cost option - simpler to crew and a strong choice for coastal and day sailing.