Both the Gulf Coast Boats 220 Bay Kat (2010) 2009 and the Gulf Coast Boats GC 220 KAT 2013 are tunnel hull 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?
Both boats share a closely matched power ceiling - 225 hp for the Gulf Coast Boats 220 Bay Kat (2010) 2009 and 225 hp for the Gulf Coast Boats GC 220 KAT 2013. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Fuel capacity breaks the other way: the Gulf Coast Boats GC 220 KAT 2013 carries 62 gallons versus 45 gallons in the Gulf Coast Boats 220 Bay Kat (2010) 2009. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 6 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 Gulf Coast Boats 220 Bay Kat (2010) 2009 and Gulf Coast Boats GC 220 KAT 2013 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.