Why does the number of the total external links and the followed linking root domains between Open site explorer and the campaign in Moz pro doesn't match?

[ConversionMobstars]

Opensiteexplorer returns 52.473 total external links and 715 followed linking root domains while my campaign in Moz analytics return 35.899 total external links and 1092 followed linking root domains. Does anyone knows how this is possible?

[DavidLee]

Hello!

In campaigns you can only toggle results for the (root) domain & subdomain where on OSE you can see metrics for both and page metrics.

Let me know if this helps!