Hello all. I am learning Irish step-dancing, and we just started doing the (hard-shoed) treble jig, as opposed to the light jigs (or double jigs) we learned in soft shoes.

My teachers have told me that treble jig tunes are considerably slower than light jig tunes, but they didn't know if there is any other musical difference. So I come to you.

Can any 6/8 dance tune be used as either a treble jig or a light jig, depending on how fast they're played? Or is every jig tune meant to be either one or the other? If so, is there an easily definable difference?

Thanks, Marion