iPhone SE has parts from 5S, 6 and 6S
If I could describe the iPhone SE in a sentence, I would say “iPhone 5S with iPhone 6S hardware”.
The iPhone SE teardown shows the parts ranged from iPhone 5S to 6S. For example, it has the 6S processor and storage but iPhone 6 modem. Moreover, it has a NFC module from 6S, but touch screen controller from 5S. Even though I was expected parts from 6S or even from iPhone 6, I wasn’t expecting iPhone 5S parts.