recently I did a check/test in cycles, the result two images with exact same scene, and exact same format size (1247x848). The first image which is a viewport render took 1 minutes and 45 seconds to render, the other one which is the F12 render took 5 minutes and 39 seconds to render, and I think both renders look pretty much the same quality, and sometimes viewport rendering has slightly better quality! I really don’t understand why. In settings I have 55 samples in viewport, 200 samples in render (but somehow final render with 200 samples doesn’t look better, it only takes more time to render). I like how renders look in viewport render, I could save my renders as screenshots, but the reason why I don’t do that is because the format resolution would be smaller, and because regularly I post-process my renders in DaVinci Resolve program to adjust exposure, gamma and color, most of the time my final renders are saved in OpenEXR format.
I'm adding both renders images down below.
By the way I’m using an old PC, rendering with processor Intel i7. I just want to learn more.
what I’m ignoring/missing?