Both the Snapdragon X and Snapdragon X Plus are based on Qualcomm’s custom Oryon CPU cores, which are designed to deliver high efficiency and competitive performance using the ARM architecture.
Qualcomm's Snapdragon X Elite Gen 2 or Snapdragon X2 Elite is still the subject of speculation, and has only been referred to in documentation by its codename, "Project Glymur." It's still early ...