The Darkside models use the 9300 movement(chronometer) whereas the 44mm Racing models use the 9900 movement (master chronometer). I've read reports that the Darkside's are slightly thicker but never verified that.
The Darkside models use the 9300 movement(chronometer) whereas the 44mm Racing models use the 9900 movement (master chronometer). I've read reports that the Darkside's are slightly thicker but never verified that.