Now I'm going to add a Diffuse node, and connect it to Alternate_Diffuse, making an ADR.

Here's what I get. This is identical to the built-in Diffuse, every time I test it, under every condition it is identical. Is that proof? No. But I have never found it to be otherwise.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)