Both the Mariah G21 2012 and the Mariah R21 2011 are modified-V designs, both built in aluminium, so the buying decision usually comes down to a handful of practical questions: how many people are you putting on the water, how far do you trailer, and what does your tow vehicle weigh?

On paper these two are close siblings in the size department - Mariah G21 2012 at 21,4 ft versus Mariah R21 2011 at 21,4 ft. Weight tells a clearer story for trailering families: the Mariah G21 2012 tips the scales at 3 600 lbs - 200 lbs more than the Mariah R21 2011 at 3 400 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.

Both boats share a closely matched power ceiling - 300 hp for the Mariah G21 2012 and 300 hp for the Mariah R21 2011. Real-world performance will come down more to which motor is actually bolted on, its load at the time, and whether it's a 4-stroke or 2-stroke setup. Both carry nearly identical fuel loads - 35 gal and 36 gal - so range won't be a tiebreaker here.

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.