Both the Campion Allante 645i BR 2013 and the Campion Explorer 682i SC 2012 are deep-V designs, both built in fibreglass, 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 - Campion Allante 645i BR 2013 at 25,1 ft versus Campion Explorer 682i SC 2012 at 25,7 ft. Weight tells a clearer story for trailering families: the Campion Explorer 682i SC 2012 tips the scales at 4 570 lbs - 533 lbs less than the Campion Allante 645i BR 2013 at 4 037 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 380 hp, the Campion Allante 645i BR 2013 has a 60-hp advantage over the Campion Explorer 682i SC 2012's 320-hp ceiling - enough to notice on acceleration and at cruising speed, particularly with a full passenger load. Fuel capacity breaks the other way: the Campion Explorer 682i SC 2012 carries 104 gallons versus 56 gallons in the Campion Allante 645i BR 2013. 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 Campion Explorer 682i SC 2012 is rated for 10 passengers, while the Campion Allante 645i BR 2013 caps at 9. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Campion Explorer 682i SC 2012 could be the deciding factor.
Bottom line: Choose the Campion Explorer 682i SC 2012 if your priority is putting more people on the water - it handles 10 passengers and at 25,7 ft it has the deck room to back that rating up comfortably. The Campion Allante 645i BR 2013 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 9 that costs less to run day-to-day.