Facebook Ads Platform Data Not The Same as Data Studio

Hi there.  I've connected a client's Facebook Ads account via Supermetrics and  for a given date range the FB interface says that the spend was £16,057.05 while the 'social spend' metric in Data Studio is only £15,919.09.

There is also a discrepancy between the Facebook Ads connector into Data Studio and the Sheets version, where some link clicks in DS have their spend attributed to destination URLs within Facebook (videos) while in the Sheets version of this data only external links with correct UTM parameters are present.

If you could take a look of this that would be great, I'd be happy to share access to the reports if that would help.

Thanks,

Joanna