Case solved, tumblr.
The answer to my original question for #Day 112 is no, those are not all the same garment. And hi, moon-ra, thank you! Hi, welcome-to-the-room too: thanks for backing up goldduststevie’s observation about Stevie’s trick with the sleeves. It’s obvious, now that I look more closely.
In terms of iconography, then, I think that means that it’s only correct to speak of the ‘Sara’ shawl when I mean the one she’s wearing in the video from the Tusk tour - i.e. the big drapey scarlet number that looks like a rather gorgeous bedsheet.