Ranger vs. Sharpshooter

[Jikanu]

As many of you may or may not know, at the lvl 120 job change, every class has to choose a path: for clerics, guardians or holy knights, for fighters, knights or gladiators, for mages, wizard or warlock, and for us, the archers, ranger or sharpshooter.

However, i'm not quite sure of the differences between the classes. some have speculated that it's difference in weapon type, though i personally doubt that... it doesnt make too much sence to me, seeing as the lvl 120 mace goes more with the guardian than the holy knight, and so on, but i'd like to open this thread to post theories about it on, or, if this information is already out, could someone please tell me the difference in class?

EDIT: i forgot to mention, even further proof that the weapon-class theory is false is the fact that fighters would then lose the one-handed sword, one of the weapons used more often by the class, in favor of the two handed sword, a weapon which, to my knowlege, is considered unfavorable.