ants do not correspond to different model structures, e.g. stable-diffusion-v1-5 is not a variant of stable-diffusion-2-0 since the model structure is different (Stable Diffusion 1-5 uses a different CLIPTextModel compared to Stable Diffusion 2.0).
Pipeline checkpoints that are identical in model structure, but have been trained on different datasets, trained with vastly different training setups and thus correspond to different official releas