The Sea King 210CC 2010 is a modified-V design and the Sea King 230CC 2011 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 - Sea King 210CC 2010 at 20,5 ft versus Sea King 230CC 2011 at 23,0 ft. Weight tells a clearer story for trailering families: the Sea King 230CC 2011 tips the scales at 4 000 lbs - 1 800 lbs less than the Sea King 210CC 2010 at 2 200 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.
The power gap is worth calling out. Rated to 500 hp, the Sea King 230CC 2011 has a 300-hp advantage over the Sea King 210CC 2010's 200-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Sea King 230CC 2011 carries 140 gallons versus 85 gallons in the Sea King 210CC 2010. 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 Sea King 230CC 2011 is rated for 7 passengers, while the Sea King 210CC 2010 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Sea King 230CC 2011 could be the deciding factor.
Bottom line: Choose the Sea King 230CC 2011 if your priority is putting more people on the water - it handles 7 passengers and at 23,0 ft it has the deck room to back that rating up comfortably. The Sea King 210CC 2010 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.