The difference is one stays local on your phone in a tpm only accessible from that device while the other is stored on some third party platform by a vendor you have never heard of with no information around security controls.

As someone who does not like Apple, you’re confidently incorrect.

FaceID information is stored locally. You have to remember that FaceID isn’t just a picture - it’s a 3D depth scan using LIDAR. If every phone transmitted that information to Apple whenever phones were unlocked it would consume an absurd amount of data and thus money.