Ah, thanks for that CM,
I didn't realise that was the case. I'm obviously confusing 'Differences' with an actual rating issue. If it's just visa waver, I may go there as I fancied touring part of the states anyway. (I don't have a FAA licence, I did my JAA PPL there a couple of years back).
Thanks Whopity, you're right, I've kind of decided to do this in UK later in the year anyway.