Is the lambdalabs/sd image variations diffusers model sd1.4

[libai-lab]

Is the lambdalabs/sd image variations diffusers model sd1.4? Is it possible to use the SD1.5 model to generate acceleration through a few steps of hypersd, or is there any other solution that can optimize acceleration? I see that using the current model requires 50 steps. Can we use other acceleration schemes for single or multi-step image generation