Canon C50 for Low Light vs. Sony FX3

So on the surface it seems like Sony wins this battle with the FX3’s dual base ISO of 800 and 12,800 ISO. Canon on the other hand has a dual base ISO of 800 and 6400. The difference of 6400 and 12,800 ISO is one stop, and while that could make a big difference 1 stop is probably not that big of a deal…until it is.