I'm not convaying this well... What I ment is,

You can turn at a very rapid speed with the mouse.... Which I normally use, especially in pvp. I have found that do to RL health issues, I have limited use of my right arm for a while.... So I must play one handed. I would like to find a way to make my directional keys turn the character at a similar speed to what I can do with the mouse. I am unsure of how to do this, or if it is even possible. Why is there a speed difference in the first place?