A comparison of Subtotal searches shown on Summary report and total "Regular searches + Federated searches" of all databases shown on Counter 4 Database Report 1:

1) If the subscriptions include any meta-product (a parent database and sub-databases) then the subtotal searches will be higher than total "Regular searches + Federated searches" of all databases shown on Counter 4 Database Report 1.

The reason:  2) If the subscriptions don't include any meta-product then both Subtotal searches on Summary report and total searches on Counter 4 Database Report 1 should match.

Subtotal Searches on Summary Report