How could Kunikov wipe the floor with Ollie when the numbers back Ollie up? The generally accepted, most accurate figures for Soviet casualties in WW2 were compiled and published by a former Soviet general, Grigoriy Krivosheev. I attach a link to a table which I invite you to read. The numbers can only be described as staggering.
http://www.magweb.com/sample/sgmbn/sgm80soj.htm
Even when the Germans were being pushed back, and perhaps partly because of it, Soviet losses remained very high, nearly 7 million casualties of all types for 1944 alone. The Red Army lost nearly 14000 tanks in 1944 alone, although there is some debate as to what constitutes a 'loss'.
What
is clear to me is that, had the Germans initiated a strategic elastic defence posture (defence in depth if you like), the Soviets, who continually used brute force up until the fall of Berlin, may have ran out of manpower as they were beginning to in 1945. Assuming we believe the generals, Hitler's stubborn insistence on refusing to give up ground unless absolutely necessary literally saved the Soviet Union from a catastrophe.
Despite what some might otherwise believe, the Soviets got lucky in WW2. They were lucky that Hitler made the 'Lotzen Decision' and diverted the German schwerpunkt away from Moscow and towards Kiev in July 1941, when Guderian and Hoth's panzers were less than 200 miles from Moscow. They were lucky that the Germans were delayed by 4 weeks as a result of the Kiev operation as there was mass panic in Moscow (on October 18th in particular) where the Germans could have rolled in and taken the city without a fight. They were lucky that Hitler lost his nerve, reigned in his most adventurous and able commanders and proceeded to resort back to WW1 tactics for major operations. They were lucky that Lend Lease kept their railroad system operational, which allowed the Red Army to conduct large scale operations.
They were lucky but they also paid a terrible price. I am quoting this from memory but I believe that for every 1 British or American soldier who died in WW2, 20 German soldiers died and 85 Russian soldiers died. The Soviets were in a hurry to finish WW2 because they knew it was killing them. They were lucky that they just had enough men to see the job done.