Mainly for comparison, I'm posting an image captured from Adelaide around the same time of Shiraz's (Ray) magnificent image today from Ardrossan.
I'm sure there is a gap in our processing technique, and the dispersion corrector helps with the colour balance, but in the end I'm thinking this highlights mainly the difference in seeing. We are probably only about 100km apart as the crow flies!
that is an impressive demonstration of variable seeing Ivan - thanks for posting.
I don't do anything fancy with processing, so suggest that the difference is solely the seeing. regards Ray