It is thought that a burgular confessed that he heard some noises from the top floor to the Gestapo.
They had a list of the names of Jews and some people turned them in if they found out about them hiding.
The Grϋne Polize and Gestapo often offered incentives or bribes to the German public for giving up the locations of Jewish members of the community. This most notably was the case with Anne Franks....
One of the ways was through informers. They were rewarded for reporting Jews in hiding.
there is no real differencedepends how you use them in a sentence that's all