The SeaCraft SC 21 Open 2007 vs SeaCraft SC20 Master Angler 2009 comparison sits squarely in the category of decisions where specs alone won't tell the whole story: intended use, storage, and long-term ownership costs all factor in.
On paper these two are close siblings in the size department - SeaCraft SC 21 Open 2007 at 20,0 ft versus SeaCraft SC20 Master Angler 2009 at 19,5 ft. Weight tells a clearer story for trailering families: the SeaCraft SC 21 Open 2007 tips the scales at 2 800 lbs - 1 050 lbs more than the SeaCraft SC20 Master Angler 2009 at 1 750 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 225 hp, the SeaCraft SC 21 Open 2007 has a 50-hp advantage over the SeaCraft SC20 Master Angler 2009's 175-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the SeaCraft SC 21 Open 2007 carries 95 gallons versus 70 gallons in the SeaCraft SC20 Master Angler 2009. 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 SeaCraft SC 21 Open 2007 is rated for 6 passengers, while the SeaCraft SC20 Master Angler 2009 caps at 5. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the SeaCraft SC 21 Open 2007 could be the deciding factor.
Bottom line: Choose the SeaCraft SC 21 Open 2007 if your priority is putting more people on the water - it handles 6 passengers and at 20,0 ft it has the deck room to back that rating up comfortably. The SeaCraft SC20 Master Angler 2009 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 5 that costs less to run day-to-day.