Using a known yeast will product a faster, cleaner ferment, some times much faster. If the juice has been pasteurized, the wild yeast is dead and you'll be dependent on whatever floats in on the breeze. It won't make any difference in the ABV.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk