It's not an argument if we can keep it civil. I'm all for, "Really?" "What do you mean?" Etc. Good old days discussion, which the internet seems to be slowly annihilating...
For the sake of discussion I made this composite image to better show my description. Believe me, I know the looks of things can be deceiving when handling a highly complex 3D object with compound curves on all sides. Reducing it to 2D can help with isolating single facets of these diamond-like geometries:
If we can agree that the Drury is a heel curve, then so is the Kreps (X28). It's just as curved at the heel. When you compare this with the other facets of the Drury, it's easier to see the overall similarity.
When I did this the first time in person, it was an E28 to E6 (original Drury) side-by-side, and I swear I recall the faces lining up even more than this W28 to W03 does. Seeing all of the similarities stack up, I had to believe the E28 is a modified Drury. It's too eerily similar in all ways to be anything else in my mind.