For questions about differences or comparisons between two or more words, lexical nuances, characters, pronunciation, syntax, etc.
In any learning process, it's common to come across topics, terminology or complex concepts that are closely related. Identifying and then accurately describing their differences is critical to gain a deeper understanding of the subject at hand, and eventually achieving mastery.
Inquiring about differences is a sign of curiosity, the attempt to make sense of what one is learning and to organize knowledge. This naturally applies to the study of languages as well.
The more expressive a language is, the more often learners will come across words and idioms that convey essentially the same meaning, but present nuances.
Having a good command of those nuances will help the learner expand their vocabulary and choose more appropriate words.
Of course, differences aren't relegated to word choices. Syntactic constructs, idioms and phrases, usage of particles require the same level of attention.
The Chinese language in particular offers ample opportunities to draw comparisons, with its variety of characters, character sets, writing styles, dialects, regional variations, and many more.
If you have doubts about anything that involves comparing two or more items, feel free to use this tag.