Or which have unusual rind flavours or scents ?
Maybe you can also remove some by elimination from your list of the best scented.
Some have a tomato type element that I am not a fan of.
It could go back to lineage / ancestry, as most mandarins we see are hybrids, and recent types are known crosses of 2 or more types.
Imperial mandarin is the best known Australian mandarin, that includes the scent from peeling it before eating.