ITA ! This is an Oscar dress , too dressed-up for the Spirit but she looks beautiful nonetheless.
As for Vinyl I think she's amazing in it, she was honestly made for the era's styling. Unfortunately the show is a bit hit & miss. It has some very strong moments, the soundtrack is amazing but it's also way too try-hard and slow at times. She's really captivating on screen though and I love her chemistry with James Jagger ( who's so freaking hot btw)