Unlike Touch ID, Apple's Face ID only supports recognizing one facial profile to unlock the device. Touch ID supports up to 5 different fingerprints, allowing you to easily share your device with friends, family, or other users.
Apple's Face ID exclusively recognizes a single facial profile.
However, on iPhone X, Apple's Face ID feature only supports recognizing a single facial profile. Enabling the Face ID unlock feature implies that you can no longer share your iPhone X with anyone else.
But if you wish to grant access to other users, you can unlock the device or share the passcode for them to use. Although using a passcode is slightly inconvenient compared to using fingerprint on Touch ID, it can be quite useful in case occasional users need to access your device.
It would be a significant issue if Apple integrates Face ID into its product lines, such as iPad devices, which are shared among multiple users. However, this depends on many other factors and your choice between using iPhone 8 or iPhone X. You can review the launch event for iPhone 8, iPhone X to understand the outstanding features of Apple's latest iPhone generation.
