The Stanley Boats Islander I/O 21 2012 is a deep-V design and the Stanley Boats Pulsecraft 20 ft. Dual 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 I/O 21 2012 at 21,7 ft versus Stanley Boats Pulsecraft 20 ft. Dual Console 2010 at 20,0 ft. Weight tells a clearer story for trailering families: the Stanley Boats Islander I/O 21 2012 tips the scales at 2 765 lbs - 815 lbs more than the Stanley Boats Pulsecraft 20 ft. Dual Console 2010 at 1 950 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 200 hp, the Stanley Boats Islander I/O 21 2012 has a 50-hp advantage over the Stanley Boats Pulsecraft 20 ft. Dual 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 I/O 21 2012 is rated for 8 passengers, while the Stanley Boats Pulsecraft 20 ft. Dual 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 I/O 21 2012 could be the deciding factor.
Bottom line: Choose the Stanley Boats Islander I/O 21 2012 if your priority is putting more people on the water - it handles 8 passengers and at 21,7 ft it has the deck room to back that rating up comfortably. The Stanley Boats Pulsecraft 20 ft. Dual 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.