Many of us have been struggling to understand the difference of pagans, wiccans, and witches...and here, from information I've gathered for others is our answer...
PAGAN - believing that energy is running thru everything including inanimate objects. both a wiccan and a witch are Pagan.
WICCAN - belief in a God and Goddess, a sub-group of Pagan.
WITCH - sub-group of Pagans OR Wiccans that casts spells. meaning depending on your belief, you are a Pagan witch, or a Wiccan witch.