The Nitro 591 SC 2006 vs Nitro Z-7 Sport 2013 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.

On paper these two are close siblings in the size department — Nitro 591 SC 2006 at 18,0 ft versus Nitro Z-7 Sport 2013 at 19,4 ft. Weight tells a clearer story for trailering families: the Nitro Z-7 Sport 2013 tips the scales at 1 675 lbs — 1 520 lbs less than the Nitro 591 SC 2006 at 155 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 200 hp, the Nitro 591 SC 2006 has a 50-hp advantage over the Nitro Z-7 Sport 2013's 150-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Nitro 591 SC 2006 carries 43 gallons versus 26 gallons in the Nitro Z-7 Sport 2013. 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 Nitro Z-7 Sport 2013 is rated for 6 passengers, while the Nitro 591 SC 2006 caps at 4. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Nitro Z-7 Sport 2013 could be the deciding factor.