The Pixel 2 XL. The Pixel has better Dynamic Range, a wonderful Portrait Mode which works like a charm both front and back, though lacks lossless zoom, the clarity loss is not miserable that one would spend a few 1000s extra leaving many more advantages.
No, the Apple iPhone X does not support fingerprint sensor. There was no provision of a fingerprint sensor in iPhone X. Since there is no hardware present, fingerprint feature cannot be provided through OTA.
Iphone X have more powerful processor and opens the games faster than note 8 but web based and system based apps are opened on note 8 faster and have some extraordinary features including S pen. So you should go for note 8 because it has double ram then iphone X and have better low light camera big curve screen iris scanner and more bright screen than iPhone X (I.e. 1200nits than only 625nits on iPhone X). So you should go for note 8