Copernicus - Registax 4/Photoshop Processing 2008 vs Re-Processing AutoStakkert/Photoshop 2019

I haven't imaged in quite a while but have a lot of old avi clips archived from years ago. I did my original processing in 2008 of Copernicus using Registax 4 and Photoshop. I took the original avi clip and did a totally new reprocessing using AutoStakkert/Photoshop this afternoon (2019). There are incredible differences but if anything my knowledge of processing has definitely not improved over the years, but in spite of that the result was quite surprising to me.