"1) Is one more tank-friendly and one more dps-friendly?
2) Is one cheaper/easier to level/easier to retail than the other?
3) Are they both basically the same until they get unique items in an upcoming patch (which would make the difference mainly in the lvls between 200 and 450)?"
Well, I am an weaponsmith, and I must say I am very dissapointed with it currently. It seems to me both weapon and armorsmith are basically the same at this point, until a patch comes along to add some items. Just make your titansteel every 20 hours and save up some frozen orbs for now.
Also read the test realm patch notes often to see what is up and coming.