According to Mark, Jesus told his friends that important people often like to be the boss and tell others what to do. But he wanted his friends to know that they should be different and not try to be in charge just to feel powerful.
Mark 10:42: But Jesus called them [to him], and saith unto them, Ye know that they which are accounted to rule over the Gentiles exercise lordship over them; and their great ones exercise authority upon them. [are...: or, think good]
In this verse, Jesus similarly speaks about the rulers of the Gentiles who lord over people, aligning rather than contradicting Mark 10:42.
Matthew 20:25: But Jesus called them [unto him], and said, Ye know that the princes of the Gentiles exercise dominion over them, and they that are great exercise authority upon them.