Display
Talk about the new Apple iPhone X and you will most probably mention the display first. Sure, the central element of the anniversary smartphone has changed quite a bit. Apple has changed almost everything compared to previous models: Panel technology, resolution, aspect ratio - there are no similarities to the old models. Apple calls the new display Super Retina HD. It is a 5.8-inch OLED screen with an aspect ratio of 2:1 or 18:9. The panel supports HDR and features a pixel density of 458 PPI, which is about 10% higher compared to the iPhone 8 Plus and its 1080p panel. The resolution on the iPhone X is 2436x1125 pixels, so the Galaxy S8 still has the edge here. Its screen has 1960x1440 pixels, which results in a pixel density of 568 PPI. The new highlight in terms of resolution is Sony's XZ Premium, the first 4K smartphone, with a pixel density of 801 PPI.
Performance
The iPhone X is equipped with the Apple A11 Bionic SoC, which is already familiar from the iPhone 8 and iPhone 8 Plus. The processor has six cores consisting of two performance and four efficiency cores. You also get 3 GB of RAM as well as a GPU developed by Apple. The SoC is manufactured in a modern 10nm process, which promises high performance and improved efficiency.
The CPU performance is similar to the other two iPhone models with the same SoC and beats all the other Android smartphone flagships by quite a margin when you look at the Geekbench scores. 3DMark's Physics scores are another indicator for the processor performance. The iPhone X is at the top of the comparison group in the older Ice Storm Unlimited test, but this changes in the more challenging Sling Shot Extreme test, where the latest device from Cupertino is only average and on par with the Samsung Galaxy Note 8 (Exynos 8895). Sony's Xperia XZ1, Google's Pixel 2 XL (both Snapdragon 835), and the Huawei Mate 10 Pro (Kirin 970) perform better in this test.