It's always interesting when a label decides to release different singles from an artist in different regions simultaneously (they took it to a new extreme with Nelly Furtado's Loose, which had all sorts of different releaeses).
For Kylie's second single, the UK is getting Daft Punk-esque "Wow," while the rest of Europe is getting electro-tinged "In My Arms." I assume both singles will eventually be released in both places.
Here's the videos for "Wow":
...and "In My Arms":