Postalveolar sounds

My understanding is that [ɕ] is effectively synonymous with [ʃʲ]; no language contrasts them, and it isn't even clear what the putative difference between them could be.

That sounds about right. I've never seen it described like that though, I've only seen [ɕ] described as [ʂʲ], but [ʃʲ] makes a lot more sense.

Yeah, I realize now that I should have been asking about a distinction between [ʃʲ] and [ɕ], thanks.