Is there much difference in terms of performance between the iPhone X and iPhone Xs?

I´ve owned an iPhone X since December 2017, and have recently had some experience of the newer XS. Despite the XS having the newer A12 chip I couldn't notice any real performance difference in "normal" everyday use. As Michael Black has posted, compare the two on the site he links. Personally, I would wait to see the new iPhones due out in the autumn and maybe spend my money on one of these, as the iPhone XS is already getting on for one year old! Regards, Ian.

You can compare them in the web site - iPhone - Compare Models - Apple

Ome thing to note is the iPhone X was discontinued last September, so Apple no longer sells them. And as is typical based on past years, new iPhones are likely to be announced this fall.