The form of the developed silver image is changed by a number of things, and these changes impart changes in tone. Therefore, you can use 2 developers to get a toned effect in either the first or second image.

As for leaving the conversation, I will be happy to do so if my use of Sabattier is distracting even though accurate. I don't wish to subtract from anything especially your most excellent photos using the Sabattier effect as shown above.