There have been articles about electronic warfare tests between Rafale and Su-35 in Egypt, where the Rafale won, but, as far as I know, it was fake news. Apparently these tests never took place. The sources were a Breaking Defense article and a tweet, both from Mahmoud Gamal, but I never found either. They both disappeared.
Then, as at one time Russia bought Western equipment, notably French, to equip the Flanker series aircraft,
fr.wikipedia.org
I imagine that French electronics was superior to Russians in terms of avionics, especially now that Russia has struggling to equip themselves with Western components. But perhaps that will change in the future, especially with China's possible aid to Russia.