I think so, yes. When the rules being applied are not necessarily the same, it leads to a lot of confusion, particularly when it is often the case that artists have somewhat limited knowledge of tax law, given that they are, quite rightly, focused on creating. After all, that is the field in which they studied and that is their vocation.
If the two measures don't provide for exactly the same averaging periods, it could certainly create some form of confusion when it comes to tax matters.