It is different, though Russia is learning now too.Well that's a pretty big stake, and Russia also sell to it's allies what's wrong with that?
Soft low interest loans to countries that are then used to buy weapons is the key, though the US takes it one step further and calls it "aide".
It is pretty much the same thing... except with the Russian model the Russian taxpayer lends the country in question some money at a very low interest rate which is then spent on Russian exports to that country... the difference is that eventually the country in question will pay back the Russian taxpayer.
Another difference is that Russia doesn't pretend to be some wonderful force for good helping its allies with "aide", that is in actual fact just a subsidy of the US military industrial complex.