To my nose, Derby is a leather/woods number that has similarities to Jules and Bel Ami. (DISCLAIMER: OK, I'M WRONG! THEY SMELL NOTHING ALIKE AT ALL!)
Derby smells nothing like MdM or Jicky.
I own all three of the scents you mentioned and, despite the raves that Jicky gets here, it's borderline too feminine for me, both the EDT and the parfume.
The dearly departed Derby and MdM are far more masculine.
Derby is a classic example of Perfumes They Should Never Have Discontinued...