The US is still the sole global superpower, it is still (yes, despite Trump) largely charged with maintaining the world order that has existed since WW2. Russia is not a superpower, its reach is regional and it has few allies. You'll see a lot of varied answers in this thread, the only one that matters is this: the US can do things that Iceland (tiny nation) or Russia (large, regional power) cannot because it's far more powerful in most every regard. That's not meant to justify any arbitrary flexing of that power that the US does, it's an explanation for why the US can do it and Russia generally can't in the case of Georgia. It's an imposition of will, backed up by immense diplomatic, financial and military power. Few countries will comply with a Russian request to arrest an American executive, dozens of major countries will at least consider a US request like the one in this case.