They can both play the deep lying playmaker role is what I was suggesting.
But yes they are different in terms of the way they both go about that role.
However we do not really have a young creative ACM who is consistant and can run with the ball at pace and drive the play forward ala Silva and that is what we need more than a deeplying playmaker type unless we plan to use Strootman differently than PSV currently do.
In fairness he is capable of playing as an attacking CM and has done on occasions so who knows.
I think Strootman and Carrick would work well for us together.