Two-part allegorical sayings and misspelled jokes and crossword puzzles of similar characters

Few people can know the correct pronunciation of all Chinese characters, because it is too complicated and has been changed several times. Fortunately, the China government has a unified plan for the pronunciation of Chinese characters, so if you are not sure, you can find the standard pronunciation by looking up the polyphonic dictionary and Xinhua dictionary. The two examples you cited are both acceptable in pronunciation and have no difference in meaning. The teacher is right.