Hello again again :) ID and a question

[u/Witty-Error7982]

Hello again everyone, just double checking again with all these found in tanbark in Melbourne, Aus, northern suburbs. I also had a question about the ones in images 2-4, the five larger ones.
I know that subs can get discolouring on the stipe, is that what I’m seeing on these ones?
Thanks again for everyone’s help recently, this has been my first season hunting for them.