Both the devices could come with support for facial recognition, in addition to fingerprint sensor for unlocking the phone. (indianexpress.com)
In addition to a fingerprint sensor, the smartphone further improves in terms of camera and battery capacity. (bgr.in)
Samsung added a feature called Intelligent Scan in the S9 and S9 +, which joins the traditional passcode in addition to the fingerprint sensor, face recognition and iris scanning features already baked into previous generations of the Galaxy S line. (tomsguide.com)