Pixel Watch distance doesn't match with Fitbit app

[GavLew79]

What on earth is going on? My distance was recorded as 10.3km on my Pixel watch and the app, but the map/pace says I've only run 9.8km?

Which one is right, and why aren't they the same? 

Did I actually run my first ever 10k or has the App or watch lied to me?

 

Moderator Edit: Clarified subject

[Triletics]

Probably neither. This inconsistency was there for years (also seen on the web dashboard). Upload it to Strava and apply distance correction so you'll find out. Fitbit isn't a runner's watch, very basic and full of issues when it comes to sports tracking 🤷

[GavLew79]

Ah. Ok. Off to Strava I go then. What a shame that the supposed No.1 fitness app can’t track a run properly. 
Yeah, I can see this issue has come up before, now that you pointed it out. Thanks.