The Ukrainian casualty mark is harder to estimate. The count may be between 40% to 65% of the # estimated for Russia's. Also, casualty counts include KIA, MIA (vaporized?), and badly wounded. I think that the Russian KIA estimate is less than 55% of the total casualty edtimate " still gravely high for a war to hostily annex 4 provinces from a neighboring country.

In conventional military planning,an attacker's casualty rate is generally higher than the defenders, and in Russian military history prior to the Cold War, this Russia relied on "meat wave" assaults until their enrmy was worn down. Once the enemy was worn down, is when Russian atrocities really began. Looting, murder, and mayhem generally marked the style of Russian occupation. After that came expulsion or "disappearance" of the remaining civilian populations, and influxes of Russian speaking colonists then remake Russia's occupied places.

Surprise! This is what's happening in Russian ocvupied Ukraine.