DxO PureRaw and Topaz Denoise AI are comparably effective photo denoisers. However, DxO PureRaw applies additional image corrections and enhancements, resulting in a better image overall.
DxO PureRaw 3 combines best-in-class raw conversion, top-tier noise reduction, and a fully automated workflow, resulting in one of the best image enhancement applications I have ever tested.
Lightroom Denoise and Super Resolution are good. But, if you want the very best upscaling, sharpening, and denoising, you want Topaz Photo AI