Doug, as you say there is not much difference in the detail of either image, other than the fact that the Modded one is a bit redder.
I believe that Eta is not a great object for a comparison shot.
This being that Eta is pretty easy to capture modded or not, for a real test IMHO would be something faint, like the Horse head, Seagull, I know they are not viable at the moment but an object or Mag 8-11, I reckon this would give you a better comparison.
I may be quite wrong here, but I'm saying it as I see it, and I too am still learning with this modded stuff, as you know.
You have however captured the Eta very well, with plenty of detail, maybe a bit red, but that is only processing, and I know what that means.
Nice work Doug.
Leon