Doceri VS Reflector: What's the Difference?

Colleagues have asked how I use the iPad in the classroom and the number one way is to annotate on it and have that displayed through the projector in the classroom.  This allows me to circulate the room and take pictures of student work to display for the class to see.  To accomplish this I have two programs available for use, Doceri and Reflector.  However the question always comes up; "What's the difference between Doceri and Reflector?"  Below is a presentation of what the differences are between Doceri and Reflector.