1. Design: iPhone X and iPhone XS share identical designs, but the iPhone XS has a new gold color option, while the iPhone X only came in silver and space gray.
2. Processor: The iPhone XS is powered by Apple's A12 Bionic chip, while the iPhone X has the A11 Bionic chip. The A12 chip is faster and more efficient than the A11, leading to improved performance on the XS.
3. Camera: While both phones have dual 12-megapixel rear cameras, the iPhone XS improves on the iPhone X with Smart HDR processing, which produces better dynamic range and low-light performance. The front-facing TrueDepth camera on the XS is also capable of adjusting the bokeh effect after a photo is taken.
4. Water resistance: The iPhone XS is rated IP68 for water resistance, which means it can be submerged in up to two meters of water for 30 minutes without damage. The iPhone X is rated IP67 and can survive up to one meter of water for the same amount of time.
5. Dual SIM support: The iPhone XS supports dual-SIM cards, allowing users to have two phone numbers on one device. The iPhone X only has a single physical SIM card slot.
