The B sample from SMS is a straight vinyl product with a stamped or colored (if you will) pattern. It's really cheap feeling and I could not imaging someone using a stamped vinyl to portray a fabric finish. The SMS fabric (A) is almost 2x the thickness of the Al Knoch material and the color is actually spot on when compared with any virgin material color such as in the folds and in behind the buttons.
In direct sunlight it looks brighter when held up to the fabric, but one is old and dirty while the other is new so it's not a fair comparison. Once held up against the button hole (Pic 3 centered between my middle and index finger ) it really is an excellent color match. I'm going to order some material from SMS tomorrow and completely rebuild both sets of seats and the rear side panels in their yellow vinyl (C).
