For most purposes and most people, the terms "citizen deliberative council" and "citizen reflective council" refer to the same category of democratic innovation, whose characteristics can be briefly summarized in the following definition:
a temporary council of one-to-five dozen typical citizens convened to consider public concerns in order to raise the quality of public dialogue and provide specific guidance for public officials and the citizenry.
If you are interested in the overall theory and practice of co-intelligent, wise democracy - or are new to this field - read Citizen Deliberative Councils and its links.
If you are already familiar with this theory and practice and would like to delve deeper into the leading edge evolution of its technical terminology, read Citizen Reflective Councils.