The Stanley Boats Islander 21 ft. 2012 is a deep-V design and the Stanley Boats Pulsecraft 20 ft. Center Console 2010 is a modified-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 - Stanley Boats Islander 21 ft. 2012 at 21,3 ft versus Stanley Boats Pulsecraft 20 ft. Center Console 2010 at 20,0 ft. At 2 000 lbs and 1 950 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 200 hp, the Stanley Boats Islander 21 ft. 2012 has a 50-hp advantage over the Stanley Boats Pulsecraft 20 ft. Center Console 2010's 150-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load.
For family outings this is probably the sharpest distinction between the two. The Stanley Boats Islander 21 ft. 2012 is rated for 10 passengers, while the Stanley Boats Pulsecraft 20 ft. Center Console 2010 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Stanley Boats Islander 21 ft. 2012 could be the deciding factor.
Bottom line: Choose the Stanley Boats Islander 21 ft. 2012 if your priority is putting more people on the water - it handles 10 passengers and at 21,3 ft it has the deck room to back that rating up comfortably. The Stanley Boats Pulsecraft 20 ft. Center Console 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.