They are comparable.

Bulgaria/Romania: You can easily get 1500-2500 Euro gross with a few years of XP. Taxes and cost of living are lower too.

Ukraine: An acquaintance of mine, who's sold a few startups, didn't have success there, because experienced people wouldn't work for less than 4k Euro. Developers get paid a lot in the big cities.

Russia: Crazy high wages in Moscow/St.Petersburg, though cost of living is insane too.

Don't know much about other countries, but the situation is definitely comparable.