My comparison really was for me to settle it in my own mind. It is no where the level that Bryan uses.
I wasn't surprised on the 2x. I thought it was similar.
The RF 1.4x exceeded my expectations.
Years ago I remember doing the same comparison in the field on my first 500mm and I used stuffed animals.
Plus I know the EF 1.4x results are bad, I need to see if something is wrong with the extender or my method failed.
I sent you the link, if you do not get it let me know.
I could do the RAW but it would take a substantial amount of work.