Given an image `[to image]` that is based on `[from image]`, extract (or... isolate) the files that changed ONLY since the `[from image]` and output it as a `.tar` file.
Given an image `[to image]` that is based on `[from image]`, extract (or... isolate) the files that changed ONLY since the `[from image]` and output it as a `.tar` file.