Albion is based on Arthurian legend so to speak and there in lie's the name system, for the most part all classes resemble there counter parts across the realms, Armsman for Albion is the primary "tank"i.e. the heavy hitter as the Beserker is for Midgard and the Hero for Hibernia. Hibernia is a magic based realm so there classes have more spell like abilities and Midgard, heh, well they are a interesting mix of magic and combat. It really boils down to ones personal taste or, as in my case my real life friends play on the server and realm I'm in