The Steiger Craft 21 Deep V Center Console 2011 is a deep-V design and the Steiger Craft Block Island 23 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 - Steiger Craft 21 Deep V Center Console 2011 at 21,0 ft versus Steiger Craft Block Island 23 2010 at 23,0 ft. Weight tells a clearer story for trailering families: the Steiger Craft Block Island 23 2010 tips the scales at 4 800 lbs - 500 lbs less than the Steiger Craft 21 Deep V Center Console 2011 at 4 300 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 300 hp, the Steiger Craft Block Island 23 2010 has a 75-hp advantage over the Steiger Craft 21 Deep V Center Console 2011'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 - 124 gal and 124 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Steiger Craft Block Island 23 2010 is rated for 7 passengers, while the Steiger Craft 21 Deep V Center Console 2011 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Steiger Craft Block Island 23 2010 could be the deciding factor.
Bottom line: Choose the Steiger Craft Block Island 23 2010 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 Steiger Craft 21 Deep V Center Console 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.