iPhone SE vs iPhone 6s: Which should you buy?

Much noise has been made about the littlest iPhone inheriting the processor and camera of its big brother flagship phone. Considering the price difference between the two, the iPhone SE makes a pretty compelling argument for why you should buy it, especially if you like smaller smartphones. Are there any compromises to be made here, and what reasons might someone have to step up to the larger iPhone 6S? Here's a quick comparison between Apple's entry level option and the top of the line iPhone.