I have reported before that I can get far better results with V7 than V8. Nothing has improved in fact its got worse. LH is V7 Low Res - Rh is V8 Low Res
My workaround for best result was first using Lightroom Classic “De-Noise” & “sharpening” sending that image to Gigapixel V8 & manually selecting “Low Res” & “model Settings” sliders. “V8 auto” wanted to use “Standard Model” which was worse than Low res.
Final image in Lightroom added “texture” to get a final image that’s very good.