Dremmar/nsfw-xl
Adapter vs stabilityai/stable-diffusion-xl-base-1.0. Dremmar/nsfw-xl is a LoRA adapter, not full weights: rank 128, on unknown modules (722 adapted matrices). It modifies stabilityai/stable-diffusion-xl-base-1.0 at load time.
2 other repos hold byte-for-byte identical weight files.