It's been previously reported that all three phones in the S23 series will be powered by the Qualcomm Snapdragon 8 Gen 2 processor and will have a 12MP front-facing camera. They are also expected to come pre-installed with Android 13 and feature a custom One UI 5.0 on top.
The Galaxy S23 Ultra is expected to have the best hardware, and it is rumored to include a 6.8-inch Dynamic AMOLED display with a 120Hz refresh rate, QHD+ resolution, and 2200-nits peak brightness. It's also expected to have a quad-camera setup, with a 200MP primary camera, two 10MP telephoto cameras, and a 12MP ultra-wide unit. The S23 Ultra is also rumored to be powered by a large 5000mAh battery with support for 45W fast charging.