Yep, you need 14 chops with Steel pickaxe to harvest Iron ore and only 10 chops with Iron pickaxe.
There is no such problem with Axes (7 chops for Iron and 5 for Steel), but I can't say that there is any difference between hammers =(
p.s.
Also there is some problem with handgun animation:
There is no such problem with Axes (7 chops for Iron and 5 for Steel), but I can't say that there is any difference between hammers =(
p.s.
Also there is some problem with handgun animation: