The Dictionary of Common Words in Ancient Chinese published by the Commercial Press was edited by Wang Li and later revised by famous experts in ancient Chinese, which is very authoritative. This dictionary contains common words in ancient Chinese, which belong to basic words and high-frequency words in ancient Chinese. Its explanation is concise and to the point, with classic examples. Many of them are entities that may be encountered in the college entrance examination. This dictionary is a very good choice for the college entrance examination.
Wang Li's Dictionary of Ancient Chinese published by Zhonghua Book Company is an upgraded version of the Dictionary of Common Words in Ancient Chinese. This dictionary contains more words than the Dictionary of Common Words in Ancient Chinese published by the Commercial Press, and it is printed in traditional Chinese characters with deeper examples. So it is more suitable for college students who dabble in ancient Chinese.
Generally speaking, both versions of the dictionary are good choices. You can decide which one is more suitable for you according to your own needs and level. If you are studying ancient Chinese in a middle school, it is recommended to choose the Dictionary of Ancient Chinese Common Words published by the Commercial Press. If you studied ancient Chinese in college, or have a certain foundation in ancient Chinese, you can consider choosing Wang Li's Dictionary of Ancient Chinese published by Zhonghua Book Company.