Yeah most likely those files have been optimized for test renders. Rendering is a balancing game, quality over time or time over quality. Usually you’re trying to struck some middle ground. The most common way is just to play with the noise threshold and samples, if you want to boil it down to one setting. But each scene is different, there isn’t a global standard number to set, you have to be the judge depending on what you’re working on and what price are you willing to pay.
