its more or less a fragile phone. Both of them bend because the metal they are using is titanium instead of steel because titanium is cheaper to manufacture. It really doesnt take too much effort for these to bend at all.
From an owner of both devices and everyone in my family has one, I have came to the decision that the iPhone 6 is way better than the iPhone 6 Plus , the 6+ is too big for any normal hand and hard to use the phone with just one hand( i dont have small hands ) The only thing that is better is the 1080 resolution, other than that i would get the iPhone 6.