Vladimir and Dimitri aren't modled on those two, not quite. However, Dimitri has a lot in common with Vladimir Putin. The backstory is similar, Both came out of the KGB First Chief Directorate (Mainly HUMINT foreign ops) but I gave Dimitri a background of second chief directorate (counter-intel) as well.
Putin came up out of the St. Petersburg KGB hierarchy, and is largely personally responsible for the culture of corruption in Russia today. During the failed coup attempt, the KGB mainly sat on the fence. They basically cut a deal with the democracy movement; KGB's perogatives (including wholesale graft and corruption) would go unchallenged, in return for their non-interference. KGB's role was critical; under the Soviet system, the KGB controlled the access codes for nuclear weapons (theirs use a PAL (PErmisive Action Link) system similar to our own); none could be detonated without their connivance. The military had essentially split on the issue, with some nuclear forces on each side. Therefor, the KGB was in the catbird seat, and Putin played a key role. Ever since, Russia has been beset by massive corruption and graft, and the old KGB are the primary culprits.
So, you're right, I detest putin. As for Medvedev, I really don't know, he's a bit of an enigma.