The buildings are so similar (the walls and floors etc. were produced in a factory and then shipped to the building site) that they serve as a plot point in the movie "Irony of Fate" - unknowingly landing in St. Petersburg, a Muscovite directs the cabbie to take him to his street address - the identically named street in St. P has an identical looking khruschevka - and the key to his apartment in Moscow, works in that same numbered apartment in St. Petersburg!