When two boats share the same hull type — in this case both the Polar Kraft 178 FS 2008 and the Polar Kraft Outlander V 2010 DC 2012 are modified vee designs with aluminum construction — 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 Polar Kraft Outlander V 2010 DC 2012 measures 21,0 feet overall (2012), giving it roughly 4,0 additional feet of deck space compared to the Polar Kraft 178 FS 2008 at 17,0 feet (2008). Weight tells a clearer story for trailering families: the Polar Kraft 178 FS 2008 tips the scales at 1 338 lbs — 1 201 lbs more than the Polar Kraft Outlander V 2010 DC 2012 at 137 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.
Both boats share a closely matched power ceiling — 150 hp for the Polar Kraft 178 FS 2008 and 150 hp for the Polar Kraft Outlander V 2010 DC 2012. 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. Both carry nearly identical fuel loads — 27 gal and 27 gal — so range won't be a tiebreaker here.
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 Polar Kraft Outlander V 2010 DC 2012 at 21,0 ft is the right call if deck space, comfort, and entertaining are top of your list. The Polar Kraft 178 FS 2008 at 17,0 ft wins on trailering ease, likely lower purchase price, and simpler docking — a solid choice for a buyer who wants more boat for less money.