What camera does the 6th-generation iPod touch have?
It is simply neither the iPhone 6 camera nor the 5th generation iPod Touch camera.

The 6th generation iPod Touch has a camera of its own. Some specs are similar to the iPhone 6 camera, but not all. The camera was upgraded from 5 Mpixel on the 5th Gen to 8 Mpixel on the 6th gen - similar to the iPhone 6. On the other hand, the camera does not have the sapphire crystal lens cover and auto image stabilization features that the iPhone 6 has.