Okay, the prince nymph thread got me to thinking, I know, dangerous, but I occasionally do it. (Just don't tell my wife. )

Does anyone know which came first?
Has anyone tried to see if one os more or less effective than the others?
What are your thoughts on the differences?

To me they look like minor variations on the same fly. I may have to get some of each and tie on a 'rig' of them and see how the finned creatures here react!

Don