So where can I find out how F-15/F-16/F-18 do against MiG-29, Su-31,
Mirage, Eurofighter, Griffon?

The USAF has a base out west someplace where they compete against
them. Might be the "Top Gun" school.

Top Gun is Navy and the base is in the desert now, no longer at Miramar.

USAF used to be Red Flag at Nellis.
Navy is now at NAS Fallon NV.