3 up, 3 down, 2 ties for each person, so the stats sing no clear victory.
It's another beef versus snipe (lol I said snipe), although in MDude's character case it's more a Warcraft 2 Death-Knigt 'Death and Decay' ranged beatery. If Armature had even a little range, with that massive durability, I would have said he could have taken down MDude pretty easily, however, all MDude (true to his nature) has to do is keep the range with superior speed and wear down that durability. In the end it'll come down to one punch between em, MDude is pretty physically week, but having taken no harassment, he'll be able to weather even that 6 strength megaton punch at least once, whereas he'll pretty much only have to poke Armature for the decayed pieces to fall off looney toon style.
So I say MDude, narrowly, based on the stats and a really cool picture in my head of that happening.