Difference of course is that scientific theories can be proven, that is the whole basis of the scientific method. Religion is ultimately faith, accepting something you cannot prove. You cannot prove the existence of God, you either believe in him or you don't. I believe in God and Jesus of Nazareth. However, I know I cannot prove either's existence. I will not know until I die. If there is nothing, so be it, I won't know. If there is, I will be at God's right hand welcoming my son hopefully a long time afterward.