The Mariah SX21 Bow Rider 2008 vs Mariah SX22 Bow Rider 2007 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 - Mariah SX21 Bow Rider 2008 at 20,0 ft versus Mariah SX22 Bow Rider 2007 at 22,0 ft. At 3 000 lbs and 3 000 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 300 hp, the Mariah SX22 Bow Rider 2007 has a 40-hp advantage over the Mariah SX21 Bow Rider 2008's 260-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Both carry nearly identical fuel loads - 44 gal and 44 gal - so range won't be a tiebreaker here.
For family outings this is probably the sharpest distinction between the two. The Mariah SX22 Bow Rider 2007 is rated for 12 passengers, while the Mariah SX21 Bow Rider 2008 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mariah SX22 Bow Rider 2007 could be the deciding factor.
Bottom line: Choose the Mariah SX22 Bow Rider 2007 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 Mariah SX21 Bow Rider 2008 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.