Dont get me wrong here , im not trying to offend you but do you have a color blindness issue ? I have seen Sapphire cards on a red PCB and a blue PCB. I have also seen an entire review which mentions a Green PCB but all the cards pictured are the Blue PCB. I have checked different reviews and as far as others are concerned its blue.
Having said that, if the cards are the same as far as looks go, same fan etc then i would think its only down to colour and the cards are the same. What does teh packaging say ? if they both give the same clocks etc then i would be inclined to beleive them.
Mactronix