While there are similarities, I think it's still very different. Default by itself doesn't make the debt disappear, you just stop serving it for a while. Then you may negotiate some cuts with creditors in exchange for a promise to repay the rest but there's no way they just forgive 100% of it, this makes no economic sense. If you want to get out of the debt completely you need not only a default but bankruptcy and dissolution which is rather painful at the state level. An example would be the Russian revolution and civil war where among other things the Bolsheviks refused to recognize tsar's debts claiming it's a new state now.