UK vs. US edition

[GKJPO]

No: HPFGUIDX 55579

For those of you who have read both the US and UK versions of the 
books, which one would you recommend as the best contrast between 
versions (I don't want to assume it would be SS/PS just because of 
the name difference)?  I have currently read only the US versions, 
but I'm taking a trip to England and am planning to get one or more 
of the UK versions.

Thanks
Kristen