Otterbox commuter case vs defender? Which to get?

I'm looking for a practical case (for iphone 5) that has very strong protection. I want my case to be able to withstand drops on the concrete, floor, etc. I don't really mind bulkiness, but I don't know whether to get the defender, because its supposedly stronger, or the commuter, because it seems to fit my needs and is cheaper. Ultimate auestion, which should I get?

Personally I don't like the looks of otterbox a on iPhones but go defender all the way there so great
For the extra buck though get a otterbox armour or the iPhone life proof case

I got this one for under $20 bucks its waterproof, shockproof, snowproof, and dirtproof.plus it's outlasted my lifeproof case! With lifeproof and otterbox your paying an extra $60 bucks just for the name.