Apple Logic Pro /LogicExpress Discussion

Hi Guys.

I'm off to the States on Holiday in the next few days, and there will  
be an Apple Store nearby.

Given the good exchange rate between $ and £, I'm very tempted to buy  
a full copy of Logic.

Simple question: are there any differences or compatibility issues  
between the US and UK editions? Will it install and work ok when I get  
it home?

Cheers!

Jon