Nice!
The other thing to consider when testing ISO and noise in the final image is the delivery part of the pipeline. If I shot in two different modes and then processed them differently in my NLE, I might be able to tell the difference between them in my NLE.
But no-one except you is watching your footage in your NLE, so you'll be exporting it, probably to h264 or h265, and you might not be able to tell the difference between them at this point.
If you're going to be uploading them to a streaming service, then that service will decompress, process (NR, sharpening, who knows what else) and then brutally re-compress it.
Lots of things are visible in the NLE and are completely gone or mangled beyond recognition in the final export or stream.