We have the Cappadocian Hillmen, the Hyrkanian Hillmen (or was that Hyrkanian Infantry?) and the Anatolian Hillmen AFAIK.

Notice that the "Hillmen" epiteth does really help distinguishing the various units from the regions. For example both the Caucassus and the Anatolian plateau offer a wide selection of local units that are just a local adaptation of widely spread 'style': axemen, light cavalry, medium cavalry, skirmishers, light spearmen and more ligh spearmen.

The ragged look has all to do with the fact that the Hillmen do not exactly come from the most prosperous parts of the world. It is not uncommon for them to seek a career in the military or as brigands either. So, one would imagine they could not afford to buy a new set of clothing after each battle and therefore would keep their best clothing far from it.