Both the Mariah DX213 Deck Boat 2007 and the Mariah R23 2012 are modified-V designs, the first built in fibreglass and the second 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 DX213 Deck Boat 2007 at 21,0 ft versus Mariah R23 2012 at 23,4 ft. Weight tells a clearer story for trailering families: the Mariah R23 2012 tips the scales at 4 000 lbs - 400 lbs less than the Mariah DX213 Deck Boat 2007 at 3 600 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 320 hp, the Mariah R23 2012 has a 60-hp advantage over the Mariah DX213 Deck Boat 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 R23 2012 carries 52 gallons versus 45 gallons in the Mariah DX213 Deck Boat 2007. 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 Mariah R23 2012 is rated for 12 passengers, while the Mariah DX213 Deck Boat 2007 caps at 10. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Mariah R23 2012 could be the deciding factor.
Bottom line: Choose the Mariah R23 2012 if your priority is putting more people on the water - it handles 12 passengers and at 23,4 ft it has the deck room to back that rating up comfortably. The Mariah DX213 Deck Boat 2007 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 10 that costs less to run day-to-day.