One phone, 2 apps, different distance. Why?

Hi guys, I don't have a smart watch yet so, when I go running, I use Strava on my Samsung Galaxy A05s and at the same time I use the Samsung Health app to track burned calories (given that Strava seems to overshoot) so the gps is the same for both app, at least I think... am I wrong?

If it is, then why Samsung Health keeps adding about 1% to the distance tracked by the Strava app, every single time?

For example, yesterday I ran 10.42 km (according to Strava), while Samsung Health reported it as 10.51 km.

Thanks