Actually there's no military difference except Russia will implode because of the news alone.

Now, until it implodes there's simply no realistic chance any nukes will fly from Russia. After it implodes, the chance is minimal, though there may be some nuclear blackmail like what North Korea does, always ending with a humanitarian shipment of grain or something.

The whole point of all this maneuvering is to preserve Russia's integrity. This is why weaponry given to Ukraine is limited in class and modernity.

This is rather cruel to Ukrainians (and Russians, because also means that NATO countries are not interested in real regime change, they are interested in controlling the current regime), but is really obvious.