This is the exact reason I ended up buying the X (comfort seats).
I test drove a RR Sport but couldn't get past the "uncomfortable to me" head rest. It was the first thing I noticed when I got in and I could not get comfy no matter how I adjusted the seat/head rest. I took it off the list immediately!
My husband and the sales guy thought I was crazy and said the head rest felt fine to them.
I hope you get it sorted out.