Not trying to make a drawn out post. Think of TouchID as if there was nothing to touch. Pretend like TouchID simply knows you when you pick up the phone. That's it. You simply pick up the phone. This is a one step process. Now FaceID. You have to pick up your phone, look at your phone, and swipe up. Three steps. The reason why I ask you to forget that you are actually touching the TouchID button is because after a while of using the phone, the physical interaction of touching the button is integrated into the process of simply picking the phone up. This is an analysis of physical interaction between the two technologies. One requires you to simply hold your phone while the other is a three step process which includes picking it up, physically placing it in front of your face, and then using your hand to gesture for unlock. If we use the principle that any technology can improve by simplifying it's process, we can see that TouchID is actually the superior technology. Strictly objective.