This is a complicated question. overall, German Jews had statistically better outcomes than others, particularly Eastern European Jews. However it is unlikely that this is specifically because of better treatment in camps. German Jews imprisoned in concentration camps in the 1930s has worse outcomes than other prisoners, baring perhaps gay men. This meant more torture, harder work, less food, more beatings, and an altogether higher death rate. If you were a German Jew deported to Ponar or Sobibor your outcomes were no better. Once you were on the train, you were condemned to death. A German Jew transported to Auschwitz was as likely to be killed immediately than any other Jewish prisoners, however if you were chosen for work, your life expectancy and chance of survival was maybe slightly higher because of an ability to communicate and therefore follow orders, but this is likely a small difference. If however you were a German Jew who went into hiding, or if you were a German Jew from an intermarriage who had non-Jewish family helping them your likelihood of survival grew. More German Jews than those in other countries also got out of Europe before the Holocaust.