CO and CAO have both same crop really amputation on ears
CAO have tails CO dont
But now due to banning of cropping and docking that will not be the case all the time.
Based on the color I would Say CAO cause the CO is being bred more for dark colors and longer hair.
But the way the pic is taking makes pup look HUGE and CO should be bigger than CAO.
however again the Russians are changing both breeds into NON working MONSTERS!!