Both the World Cat 270SD Sport Deck 2008 and the World Cat 320EC Express Cabin 2008 are catamaran designs, both built in fibreglass, 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?

Size is the most obvious dividing line here. The World Cat 320EC Express Cabin 2008 measures 32,0 feet overall (2008), giving it roughly 4,0 additional feet of deck space compared to the World Cat 270SD Sport Deck 2008 at 28,0 feet (2008). Weight tells a clearer story for trailering families: the World Cat 320EC Express Cabin 2008 tips the scales at 10 900 lbs - 4 400 lbs less than the World Cat 270SD Sport Deck 2008 at 6 500 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 700 hp, the World Cat 320EC Express Cabin 2008 has a 250-hp advantage over the World Cat 270SD Sport Deck 2008's 450-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the World Cat 320EC Express Cabin 2008 carries 260 gallons versus 200 gallons in the World Cat 270SD Sport Deck 2008. 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 World Cat 320EC Express Cabin 2008 is rated for 9 passengers, while the World Cat 270SD Sport Deck 2008 caps at 8. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the World Cat 320EC Express Cabin 2008 could be the deciding factor.