Which iPhone case is stronger?

A sturdy, solid, one, or a solid but slightly flexible one?
Both are about the same thickness.

Thanks!

Added (1). Stronger meaning which case will keep my iphone from cracking if I drop it?

Does the flexible one have bumper corners, if so then yes the flexible one if not then the strong one. I have he new otter box, mophie, lifeproof, and speck
All expect lifeproof have flexible thing

Define stronger

Define stronger and be more specific. Are you alluding to a certain company? In which case there are dozens of video reviews of iPhone cases from the major companies.

Iphone5

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