And ironically enough he's got enough money to never learn what actual Russia is like, heh.
I'm not Russian but I think the lives of the people with money couldn't really be compared with the 'actual' lives of the common people.
As such, he wouldn't know about actual France either given his status. In fact, when it comes down to it, no Parisian would even know what life on the rest of France is like either.
Since I've been on the both side of the common/rich divide I sorta know that life is totally different when you are rich. And though I hate to admit it, I don't know about the 'actual' lives of the common American anymore though now I have resorted to taking public transportation and eating cheap food due to college. The fact that I have lots of money in the bank sort of make it seems that I'm doing all these things just for show rather than actually living the same lives as the 'actual' people.
Of course the same could be said if you're poor. A hobo wouldn't know better about the lives of the common people either for example. That's why you see those funny signs...
So for Depardiau's case, he wouldn't know better either way if he had made a good choice to turn Russian. Besides, he's not even going to live in Russia anyway... At least not until his mansion in Belye Stolby is finished. For now, he's going to be in Belgium whilst paying taxes to Russia basically.
PS: I think Russia is pretty awesome personally. I've never been there but just looking at Russia's map and history makes me really interested in the country. Also, go figure, the country borders Finland and Japan