My UK version of this came this morning. There are a few differences I've spotted between the US & UK versions.
The cover does not have the embossed/metallic finish on the lettering and bowling ball that the US version has.
The UK is a triple play version, has a BD, DVD and digital copy.
The BD features the same group shot as the book cover.
The DVD has the Bowling ball image (The US single blu-ray disc has this design).
The enclosed leaflet only has the digital copy code, not the offers for "Dude" merchandise that the US one shows.
From what I can see on the YouTube video I posted earlier, the book content itself seems to be identical in both editions.
Thanks Universal for showing the confidence to release a digibook in the UK - perhaps Warner UK will now be able summon up the courage to release some digibooks in Britain!