Yes, I have both but my dark one, like CTB's, is a new one and hasn't bloomed for me yet. I can't believe it but I just searched my entire collection and don't have a pix of my "little man plant" !!! It's definitely the yellow variety and a very profuse bloomer !
I've got to say, it's one of the really unique Bulbophyllums that is definitely rewarding to keep. Good Growing! Keep it up!