The 'confrontation' never took place. The Russian sniper existed, but the Nazi sniper was propaganda. There were NO Nazi officer snipers and no such Colonel Koenig (the one written about was Major König who was entirely fictional). The Russians needed a folk hero to support the war effort and they found one in Vasily Grigoryevich Zaytsev that learned how to kill wolves from his Grandfather.
Nothing of the incident was written during the war. Only Chuikov’s memoires after the war mention it. The were written during the early 60s. A bit late for a folk hero to support the war effort don’t you think. Zaytsev didn’t even make the top ten of Soviet Army snipers for kills recorded.