Are Female ball pythons lighter then males?

I have 3 bp's. I agree that it does not seem that color and sex run along the same lines. But, out of my 3, 2 of which I know for sure are male, the other is suppose to be male, but I dont think is... I have noticed larger spurs on the 2 I know are males, the one I have come to think is female does have a bigger head, and the tail is much different, and on the males I have- not sure if it is gender related, but they got little like spikey ends of thier tails that turn up sort of...

I supposedly have two females and a male. The definite female is higher in gold, better scale softness and shine, better personality, and is cute as can be. She's my lil' honnie, and she's massive. Females are the better of the bp species :)