Based on the question, it seems that you are asking to choose between two options: “大咖讲解” (Big Shot Explanation) and “20人小团” (Small Group of 20 People).
If I had to decide for myself, I would opt for “大咖讲解”. The term “大咖” typically refers to someone who is an expert or authority in a particular field, so it implies that the explanation will be provided by someone with deep knowledge and experience. This could lead to more insightful and informative content.
On the other hand, “20人小团” (Small Group of 20 People) suggests a smaller, more intimate setup where individual perspectives are valued. While this can also be beneficial for learning or discussion purposes, it may not provide the same level of expertise or information that comes with having someone who is considered an authority in the field.
Therefore, I would choose “大咖讲解” as my preferred option.