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http://www.youtube.com/watch?v=nACZdF_Gzcc

Check it out if anyone's wondering which one is stronger.

Always fun to watch these videos, but the outcome is extremely random. In this case, the iPhone faced a very brutal flat drop, whereas the S4 landed more on it's side.

Unless you build a rig a drop 10+ phones, you can't say much conclusively. Other than it seems that phones aren't too fragile these days.
 
The real test should be for which phone looks the most sad when broken. I think the gold 5s would nab that one :D Especially in the toilet.
 
These are worthless unless you drop them from a device that can reproduce the same angle of attack...
 
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