Monkman
John Robertson
I don't think Congo was ignorant of those differences fwiw.Different positions.
Foden, Palmer, Gibbs-White are #10s - closer to the main striker, often ending up in opposition box, or around it.
Deep lying playmakers aka #6's are your Carrick's, Rice etc - they take the ball off the defenders and get the ball up the pitch. They have defensively responsibilities that the #10 may not have.