10-15 vs 15-20 is definitely comparable in my view, considering how fuzzy the numbers are.
I'd put Hitler much higher, though. That figure must be excluding a lot of war deaths. For non-war deaths, there are 6 million Jews, maybe 3 million non-Jewish Soviet citizens, 3 million non-Jewish Poles, plus a bunch of other groups with smaller numbers. Taking just those big ones, that gets us to 12 million non-war deaths.
But surely we should count at least some of the war dead. Deciding what to attribute to who is very subjective. Starting with the strongest case, 3 million Soviet POWs were killed in captivity, hard to blame anyone else for that. That's up to 15+ million. There's a good case for including Allied military deaths in the European theater, since they were killed by Axis forces. The vast majority of those are the Soviets, which accounts for another 5-8 million (not double-counting the POWs killed). I'd also include Axis military deaths under the general principle that you get credit for what happens when you start a war. That's another 5-6 million. That puts us at 25-37 million.
Then you can get really fuzzy. There's many millions of Soviet citizens who starved due to wartime disruptions, do they count? There's around a million German civilians killed during the war, or died in the immediate aftermath due to the Allies, do they count?
I'd put Hitler much higher, though. That figure must be excluding a lot of war deaths. For non-war deaths, there are 6 million Jews, maybe 3 million non-Jewish Soviet citizens, 3 million non-Jewish Poles, plus a bunch of other groups with smaller numbers. Taking just those big ones, that gets us to 12 million non-war deaths.
But surely we should count at least some of the war dead. Deciding what to attribute to who is very subjective. Starting with the strongest case, 3 million Soviet POWs were killed in captivity, hard to blame anyone else for that. That's up to 15+ million. There's a good case for including Allied military deaths in the European theater, since they were killed by Axis forces. The vast majority of those are the Soviets, which accounts for another 5-8 million (not double-counting the POWs killed). I'd also include Axis military deaths under the general principle that you get credit for what happens when you start a war. That's another 5-6 million. That puts us at 25-37 million.
Then you can get really fuzzy. There's many millions of Soviet citizens who starved due to wartime disruptions, do they count? There's around a million German civilians killed during the war, or died in the immediate aftermath due to the Allies, do they count?