The visual references I've seen, show two artistic renderings of the fabric ribbing. One group of pictures makes it look very much like Vader's, so the ribbing is clearly thicker in the comics. The other group of pictures looks ... weird. As in, the artist(s) decided not to illustrate the ribbing too clearly.
So I'm not sure if this means two types of ribbing are allowed for approval. However, I am given to understand that Detachment leadership may chime in on this within a week or so. They're kinda busy right now.
The other minor points are:
1. Forearm vambraces look swapped.
2. Some bits still show the gray colour, need to paint over with red.