V2 is adjusted overall learning parameters. It makes the style of image different from V1. Choose as your preference.
Hires fix or Tiled Diffusion (+ADtailer) would give good results.
(If interested in upscaling settings see : https://civarchive.com/articles/3588)
Trigger word : chc,
As your preference : petite, tsurime,
Recommended weight : around 0.8-1