Both the Kayot S225 I/O 2005 and the Kayot Z220 2005 are modified-V designs, so 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 - Kayot S225 I/O 2005 at 22,0 ft versus Kayot Z220 2005 at 21,0 ft. Weight tells a clearer story for trailering families: the Kayot S225 I/O 2005 tips the scales at 4 200 lbs - 200 lbs more than the Kayot Z220 2005 at 4 000 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 425 hp, the Kayot S225 I/O 2005 has a 105-hp advantage over the Kayot Z220 2005's 320-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Kayot S225 I/O 2005 carries 57 gallons versus 50 gallons in the Kayot Z220 2005. 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 Kayot S225 I/O 2005 is rated for 14 passengers, while the Kayot Z220 2005 caps at 13. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Kayot S225 I/O 2005 could be the deciding factor.