Yes sure i will add more example with all of its features (in the GIF) and more examples where GNU diff tool does not work.
Yes, it does work if you shuffle lines. There is a --primary-key option that lets you choose what columns uniquely identify a row, it can be compound too. Its assumed to be the first column by default.
Ignoring date fields is a great example you show off, and and made me realise why this is needed over regular diff.
Does it work if you shuffle the lines?