That certainly adds a twist to the discussion.

My own experience with HP5+ indicates a normal speed of about 500 to 640 and a developer like DD-X 1+4 or 1+9.
My experience with Xtol was that I couldn't get enough highlight contrast to my liking, because the film is slightly low contrast, and Xtol being somewhat compensating.
Grain is slightly more than Tri-X, but once I understood the film I was able to get what I want from it, and could easily switch to it if Tri-X became unavailable.