Waze tells you about real time traffic and dangers in the road (Like Potholes and shredded tires). a Garman GPS doesnt do that.
I probably use it more for the traffic help than directions.
As far as GPS’s in Israel (I used a regular GPS not Waze) , it would not take me to the territories, it kept telling me to go back via another way. In fact it had me going from Jerusalem to Masada without crossing the Green Line (As opposed to the direct way via Jericho)