All 3 provide an excellent protection level and a high quality standard. The all are slightly different but if you are looking for a really solid, strong case which is made by a high profile firm, you can select each one of these 3.
The Otterbox Defender is shock-absorbing and impact-deflecting materials completely cover your device along with a built-in screen protector that guards against damage to your touch screen.
It is a Multi-layer case made to withstands drops, bumps, dust and shock.
It is also Rugged, protective case made for demanding conditions, heavy use and random accidents Compatible with Samsung Galaxy S5.
The Otterbox Commuter Series for Samsung Galaxy S5 Is slimmer and smaller than the defender, so many people prefer going for this case rather the the Defender, but of course beeing slimmer it is bit less protective, altough, it is still considred to be a super protective case.
If you are looking for a good solid and strong protection for your smartphone but want to keep it less bulky and maybe a little bit more fshionable, you might want to consider the Commuter or the Symmety cases Instead,