That's pretty definitive.
Just had a fun half hour comparing the two versions. The main change seems to be a slight change in the colour, with the iris bluer and the eyebrow noticeably more magenta/red, less orange. The stars are a tad sharper, but I wonder if some of the faintest filigree in the nebulosity isn't sharper in the previous version.
Noise level is utterly negligible.
You've done a great job in maintaining the details in the cometary knots in the iris, showing the faintest outer features, and somehow, magically, maintaining the feel of their mutual relationship. Magnificent processing.
There's an orange-red blob at about ten o'clock which I'd often thought might be a face-on barred spiral - it has that look in just about everyone's shot - but you've convinced me it's actually nebulosity. I wonder if it's a part of the Helix or if it's just line of sight.
|