What's the difference between the KITKAT in Nexus 4 and in Nexus 5

I've watched a lot of videos on youtube reguarding kitkat in nexus 4 and so many of them say that nexus 4 has different features from nexus 5 and some say that its the same so I'm just asking that if Nexus 5 and Nexus 4 have the same kitkat and if no, then how's it different?
Asked Apr 13, 2014

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