Interestingly enough, we discovered that there was not one but two models being showcased: the first, seen in the video below, has a textured back and is flanked by soft-touch plastic at both ends.
As far as comfort is concerned, chew on this -- out of the box, the Rat 9's completely coated in soft-touch plastic, and if you don't like that, you can swap for a pair of textured rubber palm and pinky grips instead.