Similar - both start with glycolysis
 both make ATP without using the electron transport chain
Both end products were reduced by NADHÂ
Differences - pyrvate produced in alcohol fermentation releases CO2 and turns into acetaldehyde which then is reduced by NADH to ethanl
In lactic acid fermentation, the pyruvate is directly reduced by NADH to lactate. There is no CO2 release.Â