
Here is the statement Samsung UK gave to Android Central:
“Samsung Galaxy S 4 is equipped with a 1.9GHz Quad-core AP or a 1.6GHz Octa-core AP. The selection of AP varies by markets.
In the UK the Galaxy S 4 will be available as a 4G device with a 1.9GHz Quad Core Processor”.
It's still unsure if other European countries will get the Exynos variant or the Snapdragon variant. We know that most of the Asian countries will be getting the Exynos variant of the Galaxy S 4, as confirmed by our insider. We also know that Samsung is currently performing firmware tests on both the Exynos variant (GT-I9500) and the Snapdragon variant (GT-I9505) of the Galaxy S 4 in the UK. So, we still believe Samsung will be bringing the Exynos variant to the UK in the near future if not at the same time as the Snapdragon variant. We will keep you folks updated if Samsung releases more statements or we get any more information.
(Source: Android Central)