The ones on the S9 are good, intelligent scan and the FPS are good enough.
Except that they aren't good. The stupid eye scanner still requires you to pull the phone on a right angle to the eyes, the face scanner can still be fooled with a photo, fingerprint on the back right below the camera. So yeah, I still prefer one that works great then three mediocre.
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Face ID is even worse and easier to circumvent. Just use someone else's face.
This couple should be facing each other and not shoulder to shoulder. of they truly wanted to demonstrate that failure.