The latter (with its twisted mix of Australian, Cockney and Kings English) carries a calm sarcastic tone which indicates ones displeasure far more than the former, more vulgar statement, could ever hope to achieve.
One is however, reminded that Americans simply don't get our sarcasm, frequently leading to some amusing cultural clashes.
This is a great way of summarizing a lot of the TV we’re getting in the US that have British characters, and it’s annoying once you notice it.
See how the accent changes in Lie to Me between season 1 and season 3:
Regardless, in Blighty, such sarcasm is by no means twisted and indirect. It is as plain as the nose on ones face. As I said earlier, many Americans simply don't get such sarcasm, leading to comic clashes of culture.