To me it would depend on Death Shroud or No Death Shroud.
With I would get CoF because the mobs cower inside the radius of DS, whereas OG makes them wander outside.
Without DS it doesn't make much difference except you may not like the red numbers coming off you from OG though it shouldn't be too painful for your level. I think it really comes down to the enhancement set bonuses.
I think (without looking) that the stun sets have better bonuses, I don't think the fear ones have a purple set.