Pole Axe looks suspiciously like a cheap Dwarven War Axe to me (Remember Dwarven War Axe is a Two Handed Martial Weapon before taking an Exotic Weapon Proficiency), which it is otherwise identical to statistically, I think.
You could pretty much do this with any type, e.g. Mace, Pick, Axe etc... Basically in D&D you have the 'Light' version, the 'Normal' version and the 'Great' version'. In between Normal and Great there is room for 'Bastard' versions.
It is a joyful thing indeed to hold intimate converse with a man after one’s own heart, chatting without reserve about things of interest or the fleeting topics of the world; but such, alas, are few and far between.
– Yoshida Kenko (1283-1350), Tsurezure-Gusa (1340)