Both the Starcraft Marine 221 I/O 2010 and the Starcraft Marine Limited 2009 OB 2012 are modified-V 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?
On paper these two are close siblings in the size department - Starcraft Marine 221 I/O 2010 at 21,6 ft versus Starcraft Marine Limited 2009 OB 2012 at 20,3 ft. Weight tells a clearer story for trailering families: the Starcraft Marine 221 I/O 2010 tips the scales at 2 945 lbs - 540 lbs more than the Starcraft Marine Limited 2009 OB 2012 at 2 405 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 425 hp, the Starcraft Marine 221 I/O 2010 has a 200-hp advantage over the Starcraft Marine Limited 2009 OB 2012's 225-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 51 gal and 51 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Starcraft Marine 221 I/O 2010 is rated for 13 passengers, while the Starcraft Marine Limited 2009 OB 2012 caps at 12. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Starcraft Marine 221 I/O 2010 could be the deciding factor.
Bottom line: Choose the Starcraft Marine 221 I/O 2010 if your priority is putting more people on the water - it handles 13 passengers and at 21,6 ft it has the deck room to back that rating up comfortably. The Starcraft Marine Limited 2009 OB 2012 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 12 that costs less to run day-to-day.