On PNGs, the benefit is smaller and mainly perceptual. dE00 actually decreases with the SR model but perceptual quality increases especially if the original raster was very low resolution.

On JPEGs or other lossy compression inputs, both models help significantly. They've been trained with slightly different objectives. The SR one uses standard SR loss (with extra weighting near borders), the denoiser is trained to enforce the axioms that the vectorizer uses so it's the one that's recommended for production.

I haven't tried running both at the same time, but it might be worth experimenting. Both are open weight so you can check yourself if curious.

https://huggingface.co/Logolabs/inkvec-denoiser-001 https://huggingface.co/Logolabs/inkvec-sr-001