You get a knight's jump away from the king
Rightbut a Knight jump away from the king from the other side ( of your king ) is much more handy because you so sandwich him between your king and your queen. Then he will suffocate more and the mate is more quickly. For example.
Bye the way you can checkmate a black king thats in the center of the board in only 5 moves with a Queen and a King. Like this.