How Breakable is the iPhone 4s vs iPhone 5?

After a long run with my Android, I'm going to be upgrading to an iPhone - and am currently debating between the 4s and 5 on the sole factor of which one is more durable. You see, I throw my phones around a LOT. Toss it over there when I don't want it in my hands anymore, drop it at least 6 times, knock it off tables… My phones take a beating. So far, all of them have survived but I know people are who practically walking on glass with the amount of caution they use, claiming that iPhones are very fragile and shatter easily, which is a big fear of mine.
So basically, if anyone could compare which of the two they think could take more of a beating, that'd be great. Of course I'll try to be careful but I'm unbelievably clumsy, and if I'm being completely honest… It's going to dropped. No way around it.

IPhones in general aren't easily broken. I had all of them and never had a case on them.

Not even a scratch

One of the few good things about the iPhone 5 is the durability. I saw a drop test on YouTube with the S3 vs the iPhone 5. The durability of the iPhone 5 was amazing. The S3 came out with a huge crack om the screen.