When two boats share the same hull type — in this case both the Campion Allante 505i BR 2011 and the Campion Allante 595i SC 2010 are modified vee designs with fiberglass construction — 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?
Size is the most obvious dividing line here. The Campion Allante 595i SC 2010 measures 21,5 feet overall (2010), giving it roughly 4,4 additional feet of deck space compared to the Campion Allante 505i BR 2011 at 17,1 feet (2011). At 128 lbs and 34 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 320 hp, the Campion Allante 595i SC 2010 has a 195-hp advantage over the Campion Allante 505i BR 2011's 125-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 Allante 595i SC 2010 carries 47 gallons versus 24 gallons in the Campion Allante 505i BR 2011. 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 Allante 595i SC 2010 is rated for 8 passengers, while the Campion Allante 505i BR 2011 caps at 6. If you're regularly pulling extended family or a group of friends onto the water, the extra seats on the Campion Allante 595i SC 2010 could be the deciding factor.
Bottom line: Choose the Campion Allante 595i SC 2010 if your priority is putting more people on the water — it handles 8 passengers and at 21,5 ft it has the deck room to back that rating up comfortably. The Campion Allante 505i BR 2011 is the smarter pick if you want a lighter, easier-to-trailer boat rated for 6 that costs less to run day-to-day.