GA150A-4A Vs GA150A-4ACR

What is the difference between these two, is it just the colours. could someone explain what the numbers are.
Confused as whether to get GA150A-4, GA150A-4A, GA150A-4ACR and are they the same watch or just different colours.



http://www.ebay.com.au/itm/Casio-G-...60784563077?pt=AU_Watches&hash=item256f81bb85

http://www.ebay.com.au/itm/Casio-GA...90866454107?pt=AU_Watches&hash=item43b8fdde5b


http://www.ebay.com.au/itm/CASIO-G-...219213593?pt=Wristwatches&hash=item3a7dd4fd19

They're the same thing.