> Why do you differentiate?
Because words mean things, and precision matters.
An actual jury nullification cannot be appealed, and the accused gets to go scot-free forever in that jurisdiction, even to prosecutor's chagrin. In this case, the prosecutor could gather another grand jury and try again, at any time, without restriction, if they so choose.
Buried lede is that this is someone's chance to coin a new term for "something that feels like jury nullification but isn't because it's a grand jury and the internet lawyers are being pedantic because they really don't like the idea of people being able to point at an honest-to-god case of jury nullification."