The national average difference between boys and girls is 60 points.
This thing between girls and boys was something he just didn't get.
"Do you want to know the difference between girls and guys?"
There are things between boys and girls that I just don't understand.
The change in relative performance between boys and girls is, I think, real.
I will, however, make a personal comment, between us girls.
There's a different culture between the boys' and girls' classes.
The cross country team is split between boys and girls.
It also showed differences in attitudes between boys and girls.
Another wanted more space between the boys' and girls' cabins.