As Far as Designing Concern, Both Phones are looking Really Attractive and eye catchy. Both devices have soft, rounded curved corners and a shaped awry glass display that smoothly melds into the thin metal body of the phone. Thin Body of device make it more beautiful compared to iPhone 5.
One thing you have to be aware before buying this device is that iPhone 6 was "the most tested product" Apple ever created. Based on this, we come to a conclusion that Apple mainly Works on User's Smallest requirements at the time of manufacturing these historical devices. As per the Head Engineer of Apple, The company reportedly conducted around 14,500 tests on the iPhone 6 and iPhone 6 Plus. After reviewing iPhone 5, Apple concentrates on each and every requirement of customers and tries to fulfil all requirements for the customer's Satisfaction.
Every coin has two sides, a positive and a negative. iPhone 6 has one defect in Terms of life-span of Battery. Battery life is the only thing which is poor compare to iPhone 5s. An even larger screen could have been compress into the same housing.
But excepting its average battery life, we can say iPhone 6 having all the features that a Smartphone must have and that's why it would be a best device of Apple and the phone of the year 2014.