What is the difference between the “Tribes of the East” and the “Hammers of Fate” expansions?

200 rubles is a price more typical for pirated copies (at least in our city, they cost about that much), while 300 rubles is quite a low price (again, by our city's standards) for a licensed copy, especially if it says "Tribes of the East" on it – it's quite possible that it's a Russian licensed version (and in a Jewel case). An English licensed version cannot possibly cost less than a Russian one, so the first option is almost certainly a pirated copy.