This is kind of an undebatable topic since no solid evidence can be used to support claims o.o And its pretty much going to be consensus that both can sing well, just with different styles.
no comparison dude.. apples and oranges..no comparison at all.
women have a higher octave so their voices have a higher pitch which can break glass lol(ok,maybe not break glass lol:p)
men, on the other hand can sing deep lows(rumble in the tummy feeling low).
each has their strengths and weaknesses.
they are both good,no one wins:p