Maglight compared to a Streamlight = no comparison, The amount of light and the focus of the light DOES make a difference if what your looking for in the dark is hiding from you or is coming after you: I walked up to another officer one night who was searching for a guy who was hiding in the trees, he was shining his maglight back and forth and not seeing anything, I turned on my Streamlight and in one pass spotted the guy hiding under some shrubs and sticks. The maglight just didnt have the light output or focus to do it.
The Streamlights are just as durable as any old maglight, I have one thats been carried for about 10 years, it's been dropped on the pavement many times, dropped off the baclony of a apartment building, run over by a car, busted more side windows of cars then I can remember, left in the rain, used as a prybar, used as a baton and has never failed, only replaced the batteries 1x in all those years, so is it made well? Heck yea!
Maglights are good for haveing several laying around in case of a emergency.
Streamlights are the best full sized lights made, and the best light you can use.
Sure-Fire is the best small flashlights there are.