Throughout the operational lifespans of both the Death Star I & II, which side suffered more directly attributable casualties cumulatively as a result of the Death Stars' existence:
- Rebel combatants directly killed in action, or other people killed for their support of the Rebellion, by the Death Stars' superlasers, other armaments & onboard garrisons
- Imperial military personnel, civilian contractors and other members of the Death Stars' staff and the Galactic Empire in general who died aboard the Death Star, whether due to conflict with the enemy onboard or due to the Death Stars' ultimate destructions.
Slave labourers, Endor planetside commandos, Bothans and Ewoks don't count. Imperial personnel deployed to Star Destroyer fleets defending the Death Stars (as opposed to direct deployment to the Death Star itself) don't count. This list of exceptions isn't complete, but I think you should have a good idea what I'm looking for.
I don't need statistics, I just want to know which side the Death Stars "killed" more of. Interested in both the canon & Legends versions - How great a difference would there be between the two?