Xbox One:Xbox One Model Differences

Page content & researching taken from io55.net's Xbox One page with permission, in collaboration.

Models
''Models are arranged chronologically. There are no revisions.''

“Xbox One (original)” (2013-2016)
The original Xbox One’s main upside is the fact that they’re cheaper than any other version, as they're otherwise lower spec and bulkier. While many “bundle” versions exist for this system, such as the Xbox One Elite, none of these versions change anything except the HDD (500GB HDD to 1TB HDD/SDD), very minor visual flair, and what they came with upon purchase. As for I/O, these systems all have on the back: AC in, HDMI out, S/PDIF, HDMI in, 2 USBs, Kinect USB, IR out, and Ethernet. The front has nothing except the drive and power, while 1 extra USB port is on the side.

“Xbox One S” (2016-present)
The “Slimline” revision of the Xbox One, which surprisingly changes some of the internal hardware, albeit not by much. The back I/O is the same, minus the Kinect USB port, and the side USB was moved to the front. Furthermore, the HDMI spec has been upgraded to 2.0, the Wi-Fi speed was enhanced, and the IR blaster became integrated with the system. Lastly, some minor hardware upgrades allowed adding HDR + slight performance improvements. There is an “All-Digital” version of the S, which is completely identical except for it’s lack of a drive. Since these are still being produced, they may have the best reliability simply due to having fresh parts.

“Xbox One X” (2017-2020)
A major hardware upgrade to the Xbox One system. When it comes to I/O and physical/exterior appearances the X is the same as the S, although the X is smaller and lighter in color. However, the internals have been drastically upgraded, adding RAM, CPU/GPU power, and more. Outside of this, the X functions the same as the S when it comes to games and homebrew. The limited “Project Scorpio” edition Xbox One X may have issues with it’s drive, so keep this in mind, although this is unverified.