Europeans don't need to envy SK Telecom users any more - the Snapdragon 800-powered Samsung I9506 Galaxy S4 with LTE+ (a.k.a. LTE-Advanced) has arrived on the Old Continent (with no fuss, fanfare or even a press release). There's no pricing info available, in fact no store in Europe has yet officially announced that it will carry the upgraded device but it showed up on the official Samsung...
Source: http://www.gsmarena.com/samsung_i9506_galaxy_s4_lte_with_snapdragon_800_hits_europe-news-7031.php