Euphorbia submammillaris hybrid?

[John-B]

Hello,
I raised the question already a couple of days ago in the New Member Introduction section of this forum. Now I switch to the more specialised section since I obtained some confusing information. In two of the attached photos the plant of discussion can be seen. Some of you suggested that it is about some submammillaris hybrid. Fair inough in my opinion. From other sources, however, I was told that it might be the Pfersdorfii form of submammillaris. The Pfersdorfii plant in my collection looks quite different as can be seen in the third photo. Does anyone have a clue. I would greatly appreciate that.
Greetings from the Netherlands,
John

[John-B]

From the grower/importer I received an additional picture of a specimen from the same series. It shows a sprout with a different look (see the attachment). The involvement of E. fimbriata is suggested. What is your opinion?
Thanks again.
John