While I have never sampled Cuir d'Oranger (sounds like I should), I have had the opportunity to try Citron Citron, Tangerine Vert, and Feuilles de Tabac.
There seems to be a common oakmoss? theme in this line maybe. I especially like Tangerine Vert and don't experience the longevity issues many comment on with this scent. Feuilles de Tabac is a nice scent as well; I get lots of patchouli in this one and it is linear for the most part. I don't own any Miller Harris scents at the moment but not sure why that is. I like what I have tried, but have not fallen in love with any yet.