I will say that I am tempted to get the HTC One just so I can get the HTC Mini+ to play around with.
Bluetooth accessory that can act as a phone while you use your phone to do other things (games, music, video, etc) and even better it is a TV remote and can be used as a camera remote for your phone. Oh and it's a laser pointer!
Although the S5 has wireless charging and a bunch of fitness accessories that I hear are pretty sweet.