Does someone who has a shorter stride do more work than someone with a longer stride while walking the same distance?

My girlfriend and I have been walking to get in shape. She is four inches shorter than me and I have somewhat long legs for my height. So, her stride is shorter than mine. We usually walk about three miles. I’m usually way in front of her.

Question is; At the of the of the walk, since her stride is shorter, did she do more actually work than I did?