I really don't understand why people are still shooting s-log in low light. It just isn't helping at all. Just look at the s-log 2 and s-log 3 curves, they are not meant for low light, you'll end up with less details in the shadows and a more noisy image overall. At least, in this test, the fast lens help a lot.
Everyone shooting in low light on a Sony camera should consider cinegamma or hypergamma. At a reasonable exposure, way much informations are caught in the shadows with a bonus of a better highlight roll off than rec709 for any direct light sources in the image.