Mine came with the KW-1. The filter housing on mine has a label denoting the type.
My old 2008 Shamrock 183 came with the CC-1 filter and never had a problem in 7 years of use. Replacement filters were very cheap. But, the CC-1 housing was made of much thicker material than the KW-1.
Undecided about what to do for 2016.
2015 Shamrock 231KSS, Oyster shell
2016 Chev Silverado LT Z71 Ext. Cab, 4x4, 5.3L V/8
Reese Straight Line WDH, 2000W Honda Gen.
2 Old Town kayaks & 2 Boston Terriers - Zoey/Gonzo
Lar & Ruth
55 nights camping in 2015, 45 in 2016