XK-RS seats vs F-Type R Seats

We currently have a 2015 F-Type R, but after back surgery, I am thinking of stepping back to an XK RS. But would like to hear from others as to how the seats compare. Are the XK RS seats softer than the F-Type seats? Or do I need to just look at an XKR, hoping those seats are softer. The F-Type seats are about good on my butt and back for 3 or 4 hours. After driving from Denver to Florida for 3 days, I could just about not walk.