Re: Duh, comparing apples to oranges
Finger printer reader on the power button - I do not like at all
Firstly, the cases all get in the way - it does work mostly without a case, but I like my cases (current one has been adapted with a v sharp knife, but still more miss than hit)
Second, a power button sensor seems incredibly small area compared to a sensor at the bottom (though not having taken a phone apart, it maybe the sensors are actually identical)
Thiird, if the phone is down on the table and I have to authenticate whatever app/site/breathing of fresh air requires me to authenticate, the finger printer reader being on the side of the phone is a pain as the phone has to be grasped to work. The sensor at the bottom, press your finger on it and off you go.
Finally, fingerprint sensor on the power button is also potentially a reason for a lot of the recent ghost/silent calls to emergency services. I have done it myself until I initially changed the number it dialled to call the other half, and then found how to just disable it.
However, as Samsung have dropped the SD card after the S9, I am limited in what phones I will buy and until now, never really considered how useful the sensor at the bottom of the phone was