The high downforce part is S2 not S3. I find it hard to believe that Vettel will have maximum downforce and still top S1.
S3 is most like fast 90 degree turns. S2 is fast,aggressive,free flowing. Its impossible to say who is on a high downforce configuration as we dont know fuel loads and tyre conditions. Impossible to predict.
It only shows Red Bull have Supeior Traction.