Hi Chris!
first of al - kudus to you for your support and the support at Affinty. It is a very pleasant experience that someone takes care and answers within a really short time!!
I took the same picture you used and opened it Sigma Photo Pro 6.6.1
You are right when you say i automode it looks warmer:
but when I open it and switch to X3F-mode (on top on the right side) the differnce isn´t that big as when I open it in AP:
I cann´t compare it anymore to PS. After I switched to AP, I deinstalled PS4
So I think it is the best way to open these pictures in Sigma Photo Pro, export them as a 16bit-tif-file and than work on it in AP. I see no other way to work on these old files.
Thanks for your answer anyway