Russians didn't respect their own soldiers and had very high casualties ...
from the other hand they had some superior weapons... T-34 is the best example.
The Panther was a direct response to the Soviet T-34. First encountered on 23 June, 1941, the T-34 outclassed the existing Panzer III and IV. At the insistence of General Heinz Guderian, a team was dispatched to the Eastern Front to assess the T-34. Among the features of the Soviet tank considered most significant were the sloping armor, which gave much improved shot deflection and also increased the effective armor thickness against penetration
Germans wanted to copy it but Hitler forbbiden it from the political reasons ... it would be the shame for Germans to copy weapons from worst humans... and he thought that it could break German morale as long as it would be the best prove of their fake propaganda ... T-34 was main reason why Germans developed Panther (Panzer V) tank.
BTW ... Poland in 1939 had some superior weapons in comparison to German. Frontline was to long and Germans were too numerous ....
The 7TP was the Polish light tank of the Second World War,it was significantly better armed than its most common opponents, the German Panzer I and Panzer II. A standard tank of the Polish Army during the Polish Defensive War of 1939, its production never exceeded 140 vehicles.
Although technically superior to any of the German tanks of the era, the 7TP was too scarce to change the outcome of the war.
The PZL.37 £oś (Polish: moose) was a Polish twin-engine medium bomber, used in the Invasion of Poland in 1939. Thanks to the laminar-flow wing it was one of the most modern bombers in the world before World War II.
Karabin przeciwpancerny wzór 35 (abbreviated "kb ppanc wz. 35"; "anti-tank rifle, model 35"), was a Polish 7.92 mm anti-tank rifle used by the Polish Army during the Polish Defensive War of 1939. It was also known by its code name, kb Urugwaj (kb Ur), or by the name of its designer, Józef Maroszek.