In addition to the Tuner, the AIW has many other features that are
related to, but not part of, the tuner function. These include, for
example, video capture (from either the tuner or a video input source)
and the closed caption decoder.
Pro's generally only have outputs, the AIW's have a tv tuner input as well
as special inputs for the AIW dongle connector.. i.e. svid in, composite in,
etc...