Who makes the better overall speaker?
That's too tough to call.
Both make good product and have certain models that may be best for certain things for certain people.
Not to be evasive, but "different strokes for different folks" really applies.
Any certain models or applications you're thinking about?
Maybe that would help with the answer.
Buddha hit it on the head. What are your musical preferences? What other gear will it be mated with? What speakers are you replacing? Got to provide more for anyone to offer a suggestion.