There are so many little differences between England & America. Even the way our books look is different.
And sometimes the covers are really different. What is it about our respective countries, for example, that has the English learning about their Diamond Queen, while we're busy getting to know The Real Elizabeth? And we'd like to see her smiling, thank-you-very-much.
Although maybe the gap will continue to close. After all, we are in the middle of the second British invasion (Downton Abbey! Kate Middleton! Sherlock! That Royal baby!)
And we are often reading the same books. They just look a bit different.