While they are technically different, they are very similar and much of the "art" is the same between them. Good subtitles and CCs both have to be structured c

While they are technically different, they are very similar and much of the "art" is the same between them. Good subtitles and CCs both have to be structured carefully so that they do not negatively impact the delivery of lines in the content. The biggest offender of this is comedy series as an improperly structured and timed CC or subtitle will ruin many jokes. Another aspect of this is how they handle making it easy to digest multiple lines of dialogue. Good CCs and subtitles will either structure the dialogue such that a certain voice is always on top or bottom or alternatively will match colours to voices. Similarly, in content that is visually busy or rapidly changing, good subtitles and CCs will stay out of the "busy" section of the screen and avoid using a colour or outline that would interfere with the readability based on the background of the scene. They are different but with regards to what makes them good, they are basically the same. And to add on to this, on just about everything but live feeds, they are produced and added to video more or less the same way.