Metrics different from the portal

Hey guys, I really need to clear up just one question and if anyone has this same problem how to solve it or a related logic…

I created a flow to capture metrics from google ads and linkedin via api-rest Json, the intuitive thing is that it captures an example: cost, cost per result, leads.

When taking these tests, it is often the same as on the portal, but sometimes there is a difference of cents in the information…