I rose from the dead so to begin with: V9 - better at everything but a little less natural and more “AI-ish”, doesn't need negative embeddings and detailer every time
V8 - maybe inferior sometimes and trained too much so deviate from the “pony stuff” but believe me it makes a great base for teaching lora for specific characters etc
Tips:
Use ADetailer and/or HiResFix!
Recommended CFG ~5 (7 is ok but less realistic)
In ADetailer recommended denoising strength ~0.15 (0.1-0.2 is good)
In ADetailer to avoid some kind of cutoffs "Use separate VAE" and set it to standard sdxl vae
To avoid oversaturated images when using HighResFix change vae during process to standard sdxl (there is a separate button in Automatic1111 webui to create an upscaled version of the currently generated image)
For X and higher models recommended sampler is DPM++ 2S a
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