Tinsparrow,
If it is any help, my biggest problem when doing my PPL was getting comfortable with RT and the vast amounts of controlled/retricted/danger airspace we have here. The actual flying and handling will be the same anywhere. If it is simpler or much different in the states then it may take a while to change.
If it is possible or practical (and I'm not at all sure that it is), how about doing 3/4 of your PPL in the US and the rest in the UK.