The Nitro 591 2007 vs Nitro Z-9 CDC 2008 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 2007 at 18,0 ft versus Nitro Z-9 CDC 2008 at 21,0 ft. Weight tells a clearer story for trailering families: the Nitro Z-9 CDC 2008 tips the scales at 1 975 lbs — 1 820 lbs less than the Nitro 591 2007 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 300 hp, the Nitro Z-9 CDC 2008 has a 100-hp advantage over the Nitro 591 2007's 200-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 Z-9 CDC 2008 carries 65 gallons versus 43 gallons in the Nitro 591 2007. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 4 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.
Bottom line: The Nitro Z-9 CDC 2008 at 21,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Nitro 591 2007 at 18,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.