Max is the gas mask wearing rough around the edges inventor while Dex is a tech helmet wearing genius with a silver tongue. There's always a competition between the two, especially when it comes to you. They can be stubborn, hard headed and when tempers flare their guns are the first thing to be drawn, although no one ever seems to shoot the other. It was more for show because in the end they both loved and cared for you and both secretly cared for the other in their own way.