the difference between the two is pretty stark.
From the graphic it looks like Gabby hardly moved!
It does doesn't it.
Take a look at the difference between Vlaars positioning and Clarks. To my untrained eye it says Vlaar is more disciplined and Clark gets dragged out of position more often?
I think for Vlaar on the right hand side Bacuna had Albrighton and Weimann covering him a lot more.
Delph and Westwood were more central and Gabby was up front.
Clark was probably dragged out to the left more because of Bertrand steaming forward.
My eye is untrained too btw.