Well love and hate appear to both be cocktails of emotions, rather than individual ones, hence the endless variations of both that exist. That's going by how the terms are generally used, but since they are both on the vaguer side of emotional concepts, there'll be other ways they are used that don't fit.
Hate can have anger and fear in the cocktail, which are the two strongest individual human emotions that are clearly defined (as far as emotions can be anyway). Not to say that any moment of hate will overpower any moment of love, but that hate has the higher potential for intensity.
It's rather like how it's much easier to cause intense pain than it is to cause intense pleasure. Maybe love can reach the heights of hate, like pleasure can reach the heights of pain, but it's a lot rarer.
Aside from intensity, there's how common they both are in comparison to one another. I have nothing to go on there.
Aside from that, there's how often people base their actions on each. I actually think people tend to focus on what they want to happen more so than what they want not to happen. So if I had to guess, love wins that one.
Then there's how dramatically each one has shaped humanity. I really just have no idea here either.
Lots of other ways power could be interpreted.