Most of the time I could tell the Nic vs. DR apart, but I've only smoked a handful of CCs.

Smoking blind can really mess with me though, because a hint of flavor can send me down the totally wrong track as I've proved before in some of the blind review passes. For example, for me the LFD Double Ligeros have the pepper, earth, and cocoa that I associate with a Nicaraguan. Going the other way though, I can't think of any Nicaraguans off the top of my head where I think I'd guess DR.