Obviously the biggest change is replacing the 21' BS and the WnP with a 19' BS, however this machine is more akin to the WnP than the BS.
With regard to the 23', it hasn't changed much although I did like the orange colour of the decals and the orange flash to the canvas. The rear section no longer has the small vent above the wardrobe and the lower checker plate was omitted from the inside. Also, the door between front and back is now a folding door rather than a traditional solid door.