The Starcraft Marine Limited 2321 I/O 2011 is a modified-V design and the Starcraft Marine Limited 236 2013 is a pontoon 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 - Starcraft Marine Limited 2321 I/O 2011 at 23,3 ft versus Starcraft Marine Limited 236 2013 at 24,8 ft. At 2 300 lbs and 2 280 lbs respectively, both sit in a similar weight class - either should pair comfortably with most mid-size SUVs and half-ton trucks, though always confirm your specific tow rating with the motor added.
The power gap is worth calling out. Rated to 320 hp, the Starcraft Marine Limited 2321 I/O 2011 has a 170-hp advantage over the Starcraft Marine Limited 236 2013's 150-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Starcraft Marine Limited 2321 I/O 2011 carries 45 gallons versus 30 gallons in the Starcraft Marine Limited 236 2013. 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 Starcraft Marine Limited 236 2013 is rated for 13 passengers, while the Starcraft Marine Limited 2321 I/O 2011 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 Limited 236 2013 could be the deciding factor.
Bottom line: Choose the Starcraft Marine Limited 236 2013 if your priority is putting more people on the water - it handles 13 passengers and at 24,8 ft it has the deck room to back that rating up comfortably. The Starcraft Marine Limited 2321 I/O 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 12 that costs less to run day-to-day.