There is no difference. As you keep learning you will see how the writers choose the different phrases to express there own style.
Btw "for the love of god" is a common phrase people use when they are very frustrated.
Example: Tony's mom sees he still hasnt cleaned his room.
Upset, she yells, "for the love of God Tony, I told you to clean your room two hours ago"
Be careful when you use this though. This is technically a curse word that has the name of religious figure in it, some people might get really mad id you use it.