The Genetically Modified Yeast That Produces Lactic Acid

Sour vicier is a genetically modified yeast that produces lactic acid and ferments the beer at the same time. fili sour is not a sacramisees strain fili sour was actually harvested from a graveyard. laschancia tharbutolerance spits out a whole bunch of lactic acid which goes on for about 24 hours in the beginning of fermentation then it switches its metabolism to ethanol production so they're just different right?