Words on Comments - ORIGINAL
When we put comments especially on two objects comparatively.
If A is good and B is not that good, usually we may say A is better. In this way we may not offend B and the people that may favor B as B would have a much bigger room to accommodate Good, OK or Not Good. If we have to comment on B, we point out, in positive words, the areas that need to make improvements.
Words can be well categorized as positive, neutral and negative. We may always use positive words in writing to receive benefits of making friends. And it in turn makes us more positive as well.