There is a physical difference between the two types as well.

"At that age the physical differences between girls and boys are not a significant handicap."

But for working women, being married or single made no physical difference.

In this room, we are all equals despite our physical differences.

There are few physical differences among a group of first graders.

Bart couldn't see what other physical differences Carol was talking about.

This could be any kind of difference: physical, sexual or related to gender.

There is no physical difference(s) between the 630 and the 630i.

More than just the physical differences divide us, although those are all too obvious.

It is not directly because of the physical differences between light and sound.