I can’t post at the moment I’m about to log off sorry, maybe someone else can.
And yes difficulty matters. If Urouge beat Snack with high difficulty for example and Sanji beat Queen with mid difficulty for example, then that means Sanji defeated a much stronger Commander with less effort.
Regardless, Sanji is going to have feats that put him above a lot of the Worst Gen by the time Wano ends.