The thing is, on a Jade you can Register a multi-sig wallet. I think the sole purpose for this is that you can then verify receiving addresses. So, the way to register a wallet on a Jade, in Sparrow wallet, is to go to settings, then export. Under export there is somewhere a button specific for Jade. If you click on the button you get a QR code. This QR code holds all the information of the multisig wallet. Now, when you scan a receiving address QR code, Jade will use its seed and this Registered wallet to verify it.

So, in sparrow wallet their are many export options. In Specter there are  just one QR export, which is not recognised by my Jade. I would expect that there would be just one standardised way of exporting a wallet