IIRC the 505 has a beam of 1.8m or thereabouts, and a slightly bigger white sail area at about 17m2. So, same leverage, bit more power and about 40% more waterline length means they ought to go upwind like a train, at least in displacement mode. Their conventional kites look huge, at a guess at least as big as ours. But the Cherub wins massively on weight, probably 50% lighter, and flatter bottomed leading to earlier, faster planing. So in theory the Cherub should destroy them downwind in a breeze. But that is offset by the greater stability and general seaworthiness of the 505 in big breeze and lumpy seas. I think it would be very interesting to see how they compare in action in a variety of conditions.
