Opinion: HTC One or Galaxy S4?

Hey, I know I'm basically answering my own question, but I do not wan't to make rash decision on something I will be using extensively on a daily basis. So, I'm upgrading from an iPhone 4s, and can't decide between the HTC One and Galaxy S4. The build quality is one major factor in going with the One, as the S4's cheap plastic feel turns me away.

The upgrade pricing is as follows: €50 ($65) for the HTC One, or €100 ($130) for the S4. Sorry for the long winded post. Opinions?