What do the following line suggest about the similarity and difference between the state of Banquo and Macbeth?

This exchange illuminates us as to the state of mind each of these men have after hearing the prophecies of the witches. In line 20, Banquo says "to you they have shown some truth," meaning part of what they say is believable. Macbeth, on the other hand, isn't ready to contemplate their words..... yet.