Improper Movement/Step Tracking

Good Afternoon Y'all,

I have an Apple Watch series 3 and I use it to track all my exercise.

Last night I was walking with someone who also has (a newer) Apple Watch and we walked the same distance but his watch recorded him as walking 1.91 miles, and mine was recorded at 1.61.

This seems like a huge step/movement difference, and it's frustrating to me because I would love to know accurate information about my exercise.

Why is this? Is there a way to recalibrate the watch to make it line up better?

Thank you!