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The 6 is definitely superior hardware to a TouchSuperior how? The iPod Touch has the same SoC/CPU/GPU/RAM. The only real hardware difference is the iPhone 6 has a 4.7" screen, and while I personally enjoy my 5.5" screens, the popularity of the iPhone SE suggests that many people disagree that a larger screen is "superior hardware".
That said, I have no idea how the camera compares. Maybe it is worse, maybe it isn't. Wikipedia isn't very forthcoming here.
Well, Wikipedia does point out that the iPod Touch doesn't have the ambient light sensor that's used for automatic screen brightness. If true, this is actually kind of surprising (I would assume that component isn't very expensive), but I guess it does technically qualify as "inferior hardware", though this is a pretty small difference.