i agree with wayne. the question was will it make a difference and it
does make a difference. how that difference effects the operation of
the unit is most probably minor, but it will affect gps performance.

On the other hand, over time, the internal antenna unit could turn out to be
more reliable since there is no antenna cable to flex and break (highly
unlikely) or antenna/cable connections to corrode from exposure to the
elements (quite a bit more likely). Yet another minor point.