Polearms have more base range and are typically not Unbalanced, but 2hands have more ranged added from their animations and are typically Unbalanced (shorter window to cancel a swing) and are, in general, cheaper than Polearm axes.
For reference, here are the lengths animations add/detract for polearms/2hands:
2h
Overhead = +15
Left-to-right = +17
Right-to-left = +13
Thrust = +80 (This may be slightly wrong with the new stab animation)
2h Polearms
Overhead = -15
Left-to-right = -7
Right-to-left = -2
Thrust = +19
Also, 2hands in general seem to have less issues with clipping on scene objects than polearms, and shorter ones even less so- so less length on paper isn't always a detriment. At the bar that girl might be a 7, in your bedroom she'll go up to a 10, and the morning after she may drop down to a 5. Environment dictates.
