This script is mostly written by OpenAI ChatGPT. It works, at least on my PC.
This script is displaying random images from the target folder with minimal UI.
You're able to discard images you don't want.

You can download the script in your Terminal:

git clone https://github.com/AyoKeito/image-comparison

Or you can download a zip archive from Releases

Discarded images are moved to discarded subfolder. Nothing is deleted.
To discard an image, press:
A or Left Arrow to discard image displayed on the left.
D or Right Arrow to discard image displayed on the right.
W or Up Arrow to keep both images displayed and discard none of them.
S or Down Arrow to discard both images displayed.

The loop will continue, until only 2 images are left in the target folder, or application window is closed.
All file operations are logged into the terminal.

usage: batch_sorter.py FOLDER_PATH

batch_sorter.py can be run from the terminal directly. It accepts folder path as an optional argument.
If no folder path is provided, or provided path contains no images, a file dialog will appear to select the folder you want.
There are no other flags or arguments to use.
All errors are logged into error.log

If needed, it creates a venv in the program's folder, installing pillow and pyqt5
After that, it simply runs the script using this venv.