So this flew under the radar but the Japanese went and tested GPUs again in Stable Diffusion models using ComfyUI. They test 1.5, SDXL in a dozen couple of situations using ControlNet + HiResFix and even Qwen.
https://chimolog.co/bto-gpu-stable-diffusion-specs/
Here's one of their 4k tests in SDXL. It's actually a bit shocking how well Intel GPUs do here and actually in the conclusion, they suggest if you don't want to go non-Nvidia, you should buy Intel over AMD. Kinda surprising.