Both the Seaway Boats 18 Sport 2013 and the Seaway Boats 18 Sportsman 2011 are deep-V 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?
On paper these two are close siblings in the size department - Seaway Boats 18 Sport 2013 at 18,0 ft versus Seaway Boats 18 Sportsman 2011 at 18,0 ft. At 1 200 lbs and 1 100 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 Seaway Boats 18 Sport 2013 carries a rated maximum of 90 hp. Engine data for the Seaway Boats 18 Sportsman 2011 wasn't available in our records - check the manufacturer's spec sheet before sizing a motor.Fuel capacity breaks the other way: the Seaway Boats 18 Sportsman 2011 carries 40 gallons versus 12 gallons in the Seaway Boats 18 Sport 2013. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 5 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 Seaway Boats 18 Sport 2013 and Seaway Boats 18 Sportsman 2011 are closely matched on the specs that matter most. Test-ride both on the water you actually use, check current dealer pricing, and factor in long-term service access before you sign.