Octavian Iacob :
Which one do you preffer and why? Which one is more "future-proof"
Also I am open to other suggestions
The Samsung is more powerful as it's first phone on the market with a 14nm CPU (allows it to maintain higher speeds and use less power). It also has about the best screen available.
That said the HTC one M9 is a really nice bit of kit, and personally I *much* prefer HTC's software (they keep everything really simple and clean). So despite the pure hardware prowess of the Samsung I'd get the HTC from a 'living with it' perspective (I really can't stand Sammys 'touchwiz' software overlay).
The Samsung is probably the more future proof, although I'd say both are pretty safe as both have a modern 64 bit processor. I'd avoid...