This will make reasonable quality 4bit ANSI Art-style graphics. Not really quite 4-bit, but you can replace the colours in any graphics editor if you like. Upscaler is needed for the best effects (4x-Ultrasharp should do). Use simple, minimalistic prompts. Although you can experiment and see where it leads you.
While the XL model has better fidelity when it comes to character/block dimensions and 4-bit color palette, but it seems a bit dull compared to the 1.5, however it will depend also on the base model used.
Use weight of ~0.8, clip skip 1, denoising 0.6