i think it maybe mugen, for his ability to adapt to situations, regardless of his reckless ness, like his fight with, that joutsu guy or w/e who knew that kung fu wehre he could make your hands bleed,....i give up on trying to explain taht episiode but, i think he may take it.....despite jings calm, steady thinking and watching situations to see which way to attack them, these char. r in most way exact opposites lol, but i think mugen may take it, with his ferocity
have ther ebeen new episodes, i quit watching the show a while back when i started to see repeats, but never checkd for new episodes, if there have been,they may better my opinion
it'd probably come down to a tie, Mugen is wilder and faster, but more rash, whereas Jin is precise and accurate, but isn't quite as all over the place as Mugen