It's not just a question of tactics. At certain times in Stalingrad, Soviet troops were paired up with each other; one would carry a gun, one would simply follow. The following soldier would wait for his lead to die, and then take up his weapon. If he didn't charge straight into certain death, a Soviet officer would gun him down.
In the Battle of Berlin, the Soviets treatment of both German soldiers and civilians was nothing short of horrific.
'They raped every German female from eight to 80' | Books | The Guardian . German units who were fleeing Berlin on the onset of the Soviet attack would purposefully surrender themselves to Allied troops, knowing that they'd be sent to forced labor camps or just outright killed by the Soviets.
"In many areas of the city [Berlin], vengeful Soviet troops (often rear echelon units) looted, raped an estimated 100,000 women and murdered civilians for several weeks".
"Of the 91,000 German prisoners [at Stalingrad], only about 5,000 ever returned. Already weakened by disease, starvation and lack of medical care during the encirclement, they were sent to labour camps all over the Soviet Union, where most of them died of disease (particularly typhus), cold, overwork, mistreatment, and malnutrition."
"A study published by the German government in 1989 estimated the death toll of German civilians in eastern Europe at 635,000. With 270,000 dying as the result of Soviet war crimes, 160,000 deaths occurring at the hands of various nationalities during the expulsion of Germans after World War II, and 205,000 deaths in the Forced labor of Germans in the Soviet Union. These figures do not include at least 125,000 civilian deaths in the Battle of Berlin."
Do these things nullify the sacrifices made by the Soviet soldiers in World War II? Of course not. However, these things should be kept in mind before one starts praising the Red Army, and especially if one tries to change the entire point of the thread by bringing up Hiroshima/Nagasaki.