Did the USSR triumph over Nazi Germany because quantity won over quality or did the Red Army defeat the Wehrmacht at the tactical & operational level?

Did the USSR triumph over Nazi Germany because quantity won over quality or did the Red Army defeat the Wehrmacht at the tactical & operational level?
Quantity beat quality
They won at the tactical/operational level
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Did the USSR triumph over Nazi Germany because quantity won over quality or did the Red Army defeat the Wehrmacht at the tactical & operational level?
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