All four show a truly remarkable amount of detail. We're surprised how much detail there is in the straight RGB, and how little extra is added in this very particular case by NB.
If we had to pick a favourite it would be the L Ha OIII RGB combo. It seems to have everything good, including faintest and sharpest, and nothing troublesome. A curious observation is that the stars seem larger in the combo version.
No objection to the colour in the straight Hubble Palette version. It's just a tiny bit too brassy compared with the combo version, which is more subtle.
Lovely work all round.
|