To be fair, this is much more significant for several reasons.

First, this is Russia, a nuclear power and only 30 years ago one of the big two in the Cold War. They have the potential to bring World War III, unlike any of the aforementioned countries.

Second, Ukraine might be the largest country to voluntarily give up its nuclear weapons in exchange for peace. If Ukraine doesn't come out on top after this, its distinctly possible no one will ever disarm again, and many more might seek their own.

Third, Ukraines political and economic situation has been nothing like the aforementioned countries, several of which have never really known peace or prosperity. A "new" conflict there is practically the status quo. If war can come to one place at relative peace and prosperity, others in a similar situation better take note.