The Advantage 21 SR BR 2007 vs Advantage 22 Party Cat MX 2008 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 — Advantage 21 SR BR 2007 at 21,0 ft versus Advantage 22 Party Cat MX 2008 at 22,0 ft. Weight tells a clearer story for trailering families: the Advantage 21 SR BR 2007 tips the scales at 2 975 lbs — 2 633 lbs more than the Advantage 22 Party Cat MX 2008 at 342 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.
For family outings this is probably the sharpest distinction between the two. The Advantage 22 Party Cat MX 2008 is rated for 12 passengers, while the Advantage 21 SR BR 2007 caps at 7. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Advantage 22 Party Cat MX 2008 could be the deciding factor.
Bottom line: Choose the Advantage 22 Party Cat MX 2008 if your priority is putting more people on the water — it handles 12 passengers and at 22,0 ft it has the deck room to back that rating up comfortably. The Advantage 21 SR BR 2007 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 7 that costs less to run day-to-day.