Standalone does not use any data where Google and Verizon do. The standalone is nice if you want to use your maps /navigation without draining your battery or data. The only time GPS drains battery is when you use an app that requires it. You will also see the GPS symbol in your status bar whenever Google or Verizon GPS is being used but no GPS symbol for when just the standalone is used (which is basically only for maps and navigation anyway, so you don't have to really worry about it).
Things like FB use GPS but if you have them turned off, you will get a prompt to turn them on when needed. Maps & navigation will also prompt you to turn on Google /Verizon GPS but as long as you have standalone on, you don't need the others and it will save data & battery.
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