Interesting question. I think it is more to do with how people or individuals percieve what is happening.

For example, when I danced for the Wyre Forest Morris Men we danced the same way whether dancing for the public or for other dancers (e,g, at Ring meetings). The public would not know enough about morris to know whether we were showing off or not; other dancers would recognise that we were better than them but it would be their perception as to whether we were showing off or not.

As it was, when we danced for the public we did so to give them the best show we could (perfromance); when dancing before other dancers we did so to make it clear how much better we were (showing off).