The hardware breakdown of both consoles was done by research firm IHS, with the results being exclusively revealed to AllThingsD.
The main source of the price disparity is the Kinect sensor, which costs at least $75 to make and comes included with the Xbox One. The PlayStation camera is not bundled with the PS4.
Memory also contributed to the price difference between the two consoles. The Xbox One contains older, more commonly used chips – DDR3 memory – compared to the PS4's newer GDDR5 memory. The Xbox One's memory cost around $60 – that's $28 less than what's in the PS4.
Here's the full breakdown:
Power brick: $25