Not and order, just an observation.
I was looking at the grain sheet and there's two listings for the Avangard Munich with different SKU but identical descriptions.
Researching it, i.e. googling and taking the first result, it seems the 1854C is dark; the 1856C is light.
Similarly with the Avangard Caramel listings: 1858C is light (8L) and 1860C is medium (30L)