Sorry for the cross post; this question is also in the WR250R/X thread.
From the Seat Concepts FAQ
Q: What is the difference in cover materials?
A: Gripper: Great for aggressive riding or being held in place. If you like to slide around do not order this cover. Carbon: A black vinyl that has a carbon fiber pattern made into the surface for a good look. There is a texture that acts like a very light gripper. Embossed: A smooth black vinyl with square dimples embossed into the material but not all the way through keeping it water resistant. This cover will scuff if dragging sharp edged items across surface. Plain: A nice leather grain vinyl similar to some stock seats. ALL covers are marine grade vinyls and water resistant.
I don't want Gripper, as I like to move around.
Carbon sounds good.
Don't like that Embossed scuffs easily.
Based on this FAQ, I would order carbon top, plain sides. For those of you who have a Seat Concepts already, what cover material(s) do you have, and why would you buy (or not) it again?