What is the difference exactly in toughness between the commuter series and the defender series?
And how does the display protection of the defender series compare to zagg's invisible shield? Zagg's invisible shield is almost impossible to get a scratch or a mark on. What about the defender series of otterbox? I mean, since you say I can't have both on my phone ("not compatible" you said earlier in an answer to a question) I have to choose somehow. ;-)