What is the best way to remove noise without removing details

What is the best way to remove noise without removing details while keeping the video quality the same without any change in the video

and can someone tell me details what the difference between proteus and nyx

It’s difficult to make recommendations without the source clip.

Proteus is a general enhancement model that excels when reducing noise for low-medium quality footage.

Nyx is another denoise models trained for preserving detail in high-res footage.

If you’d like to upload the source clip to our dropbox, I can make some recommendations

Thank you. Actually, I do not mean a specific clip, but I am asking in general
so i can say i have to go to proteus if video resolution less than 720p
and nyx for 720p and above?

personally, i thought nyx1 (now nyxfast) did an amazing job with low resolution footage. for some reasons it can only apply a 150% size scaling :ß