oh, by no means, Arthas was training all his life to become a paladin, and he was much like anakin, in as much fact he was looking to be one of the best, and then like anankin he goes all pyscho.
Plus his sword, Frostmourne, is one of the best weapons in any game, so its a mile and a half better than Aurons. But Aurons is simply alot faster, and probably more skilled. A melee would be good, but i bet Auron is better at it.
I'm starting to think Arthas, as you say, he's not going to die immediatly in melee, he'd probably live long enough to get in some spells.... Whos knows
take into account he took illidan, i cant see Auron being faster than Illidan, Illidan is a psycho Demon trained at the beginning for speed, not to menstion hes a demon which gives him increased abilities....Arthas sliced him down quite easily
Also ime wondering if the Fact Arthas is half dead and quite supernatural can allow him to survive things Auron wouldnt like cuts into him...he is a Death knight afterall
and wheres the FF fans