'Unmix Song' Flac v WAv quality

Im just wondering if anyone has noticed any sound quality difference unmixing songs in Flac instead of Wav .
Should they be exactly the same quality , of course matching sample rates and bit depth .

As long as the FLAC file comes from the same source as the WAV file (including sample rate and bit-depth), there should be no difference quality-wise for the audio itself.
I’m not sure if there is a possibility for some differences for each stem after the unmixing process due to the used algorithms, but at least within a quick test with 2 duplicate layers I got the same unmixed result.