The Mariah G21 2012 vs Mariah SX21 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 G21 2012 at 21,4 ft versus Mariah SX21 Bow Rider 2007 at 20,0 ft. Weight tells a clearer story for trailering families: the Mariah G21 2012 tips the scales at 3 600 lbs - 300 lbs more than the Mariah SX21 Bow Rider 2007 at 3 300 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 Mariah G21 2012 has a 40-hp advantage over the Mariah SX21 Bow Rider 2007's 260-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Mariah SX21 Bow Rider 2007 carries 44 gallons versus 35 gallons in the Mariah G21 2012. On a lake day that's negligible, but for coastal cruising or long reservoir runs the extra range matters.
Both boats are rated for 10 passengers - a good fit for a family of four or five plus guests. Comfort at capacity is another matter; the longer hull typically means more seat options and better weight distribution.
Bottom line: Performance buyers should lean toward the Mariah G21 2012 and its 300-hp ceiling. If fuel economy and quieter running matter more than top-end speed, the Mariah SX21 Bow Rider 2007 with its 260-hp rating is the more economical daily driver.