This is from my first 10 turns, AI vs AI test done for each version of the game.
AFV lost under 1.08.08: Axis 871, Soviet 8534
AFV lost under 1.08.09: Axis 1003, Soviet 8057
ratio 9.79 -> 8.03
AFV lost under 1.08.08: Axis 361, Soviet 2181
AFV lost under 1.08.09: Axis 390, Soviet 2080
ratio 6.04 -> 5.33
Stalingrad to Berlin, first 10 turns, AI vs AI
AFV lost under 1.08.08: Axis 502, Soviet 5574
AFV lost under 1.08.09: Axis 718, Soviet 5072
ratio 11.10 -> 7.06
Vistula to Berlin, first 10 turns, AI vs AI
AFV lost under 1.08.08: Axis 1053, Soviet 3518
AFV lost under 1.08.09: Axis 1628, Soviet 3732
ratio 3.34 -> 2.29
This is from an older version of .09, and losses were toned down a bit, but I had no time yet to record casualties from last night runs. But you see the general trend.
There is an interesting spike in Soviet tank losses mid-war (especially in GC 43, not listed here because I have to confirm it first in multiple tests), and I think it can be attributed to the fact that German tanks improve a lot between 1941 and 1943, while Soviets just churn out huge amounts of nearly the same model of T-34, and the modern tanks (T-34 M1944, heavy ISes and ISUs) start to have impact only in second half of 1944. So in the period when they are going to the offensive, the Soviets have to fight with their tanks being outclassed, despite having better organization and morale and experience than in 1941, while facing German AT defenses upgraded to 75 and 88 mm guns, Panzerfausts, Panthers, Tigers, long-barreled IVs, and various other heavy contraptions like the Ferdinand. That's why the early Soviet attack period (late 42-43) sees highest Soviet tank losses, which are later reduced when new models come online and the quality gap closes.