Australian Consumer law says that if the product must 'match descriptions made by the salesperson, on packaging and labels, and in promotions or advertising'
If there's a minor problem the seller can choose to remedy it with a replacement (not applicable here really), repair (can't be done) or refund and compensation for loss.
IF the problem is major (ACCC website indicates amongst other items "is significantly different from the sample or description") you are guaranteed a refund.
Not sure whether they would see this as 'significantly different' or a minor packaging/printing error. That would be one to argue. The number of ROPS are wrong, the RAM is technically still 4GB although not utilised as you would have expected.
Check out the ACCC website or consumer affairs in your state/territory.
Cheers
Jimma