Definitely LOVE. I have a really simple explanation for that. Just think what people can do because of love?! Very often they forget about the danger if they need to help the dearest and beloved ones. They are not just overcoming their fear, they're forgetting about it at all. :)

In my opinion, of course love have more power. Why? First, beacuse of love,you have a brave heart to love ours and to love the people around you; Second, Beacuse of love, you have a strong belife to face the difficlut things , to face the world . Last but not least, fear is come from lacking love, While , Love can make you defeat the fear So All in all, Love have more power than fear . this is my answer, thank you .

Reading this book by Niccolo Macchiavelli might answer that question for you "The Prince". Since this question pretty much reminds me of this book.

I really liked your idea Thanks to raise the spirits.