Arrow speed and projectile speed?

I get what projectile speed does, but what does arrow speed do? I mean projectile and arrow is the same thing. Increased projectile speed makes your arrows go faster. So what is arrow speed in that case?

Anyone have a good answear?

projectile speed is all projectiles I think, arrow speed is only arrow

ah so if I get this right. I have 40% increased projectile speed and I tried with fireball and it says 40% under fireball aswell. So I do not know the difference betweeen arrow and projectile speed hmmm

Arrow speed would be a subset of projectile speed as it affects only projectiles made using bow attacks. Projectile speed affects all projectiles, be it spells, wand attacks or bow attacks.

You should ask questions like the in gameplay help, this isn't really feedback, unless you wanted to let devs know that ingame stats could have a description.