WI Davout had managed to hold the fleches after his initial attack and managed to seize a decisive French victory (many more Russian casualties, killing Bagration and Barclay de Tolly). At the end of the day the figures look like this:
Russian dead or wounded: 68,000
Captured: 5,000
Uninjured: Approximately 48,000
French dead or wounded: 24,000
Captured: 1,000
Uninjured: 105,000
Would we still see the Grande Armee fall apart upon taking Moscow? What happens with the remaining 40% of the Russian army?