1.6x is not "almost twice" and that's comparing the larger storage X to the base S8.
iPhone X 64GB - 897 GBP -> https://www.amazon.co.uk/dp/B076GQZRR9 (there is one seller for 800 GBP, but it has 0% positive ratings and looks like a scam)
1.8x for the same size
The iPhone X price is still ridiculous, don't get me wrong, but Samsung phones are pretty damned expensive on launch, too.
The Note 8 launch price was pretty close to the iPhone X.
[0] https://www.apple.com/iphone/ [1] https://www.bestbuy.com/site/samsung-galaxy-s8-64gb-unlocked...