The Cobia Boats 206 CC 2008 is a modified-V design and the Cobia Boats 220 Dual Console 2012 is a deep-V design, so you're likely deciding between two noticeably different on-water experiences. Hull type shapes everything from ride quality and fuel burn to dock handling and resale trajectory.
On paper these two are close siblings in the size department - Cobia Boats 206 CC 2008 at 20,0 ft versus Cobia Boats 220 Dual Console 2012 at 21,6 ft. Weight tells a clearer story for trailering families: the Cobia Boats 220 Dual Console 2012 tips the scales at 2 950 lbs - 500 lbs less than the Cobia Boats 206 CC 2008 at 2 450 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 - 200 hp for the Cobia Boats 206 CC 2008 and 200 hp for the Cobia Boats 220 Dual Console 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. Fuel capacity breaks the other way: the Cobia Boats 206 CC 2008 carries 100 gallons versus 90 gallons in the Cobia Boats 220 Dual Console 2012. 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 Cobia Boats 220 Dual Console 2012 is rated for 8 passengers, while the Cobia Boats 206 CC 2008 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Cobia Boats 220 Dual Console 2012 could be the deciding factor.
Bottom line: Choose the Cobia Boats 220 Dual Console 2012 if your priority is putting more people on the water - it handles 8 passengers and at 21,6 ft it has the deck room to back that rating up comfortably. The Cobia Boats 206 CC 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.