When two boats share the same hull type — in this case both the Donzi 28 ZX 2008 and the Donzi 29 ZF Open 2008 are deep vee designs with fiberglass construction — the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department — Donzi 28 ZX 2008 at 27,0 ft versus Donzi 29 ZF Open 2008 at 28,0 ft. At 65 lbs and 62 lbs respectively, both sit in a similar weight class — either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.

The power gap is worth calling out. Rated to 700 hp, the Donzi 28 ZX 2008 has a 150-hp advantage over the Donzi 29 ZF Open 2008's 550-hp ceiling — enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Donzi 28 ZX 2008 carries 94 gallons versus 18 gallons in the Donzi 29 ZF Open 2008. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.

Both boats are rated for 8 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.