When comparing HummingBoard Gate vs Orange Pi PC, the Slant community recommends Orange Pi PC for most people. In the question“What are the best single-board computers?” Orange Pi PC is ranked 14th while HummingBoard Gate is ranked 23rd. The most important reason people chose Orange Pi PC is:
The Orange Pi PC is extremely cheap, especially compared to the SBCs it competes against.
Specs
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Pros

Pro Same software runs on single to quad CPU without any problems
Since the HummingBoard Gate comes with different versions, including different CPU versions, it can also run the same software without any problem on any CPU regardless of the number of cores.
Pro Some models fit inside a Raspberry Pi case
HummingBoard-Pro and HummingBoard-Base fit inside a Raspberry Pi model B case (but be aware that many cases will block the IR).
Pro Extremely extendable
Hummingboard Gate has a native mikroBUS system which lets users attach any “click board” that’s compatible with MikroElektronika’s system. This way the board can be extended by adding motion sensors, wifi cards, physical buttons, temperature sensors, NFC or Bluetooth and much more.
Pro Can be used as a media streaming device
HummingBoard works really well with Kodi and can be turned into a media streaming device with ease.
Pro Selection of great operating systems
Hummingboard supports OpenELEC 5.0, GeexBox XBMC, Android and Debian officially, but it can also run ArchLinux, openSUSE and Fedora successfully.
Pro Extremely cheap for what it promises
The Orange Pi PC is extremely cheap, especially compared to the SBCs it competes against.
Pro Supports almost all OSes supported by Raspberry
Orange Pi supports Raspbian, Ubuntu, Android and many more operating systems. It claims to support all OSes supported by Raspberry Pi and it seems to be true most of the time.
Pro Great value for the price
Great little linux box for the price
Cons
Con Pretty expensive
Starting at $70, prices can go up to $235 depending on the model and the components that users choose to add to the board. For these prices it's rather expensive relative to other single board computers.
Con No built-in Wifi for the cheapest version
The cheapest version of the Humingboard Gate doesn't have a built-in Wifi card. You can either buy it separately as an add-on or you can buy a more expensive version of the Humingboard Gate which has a built-in Wifi card.
Con Has some thermal throttling issues
The Orange Pi can get pretty hot, up to the point where it needs to shut down cores to keep it from locking up.

Con First Party OS support is practically non-existent
Con no wifi
Con Has problems with slow microSD cards
Anything less than a class 10 TF/microSD card will probably not work with the Orange PI. Since the testing and production of the Orange Pi was rushed massively, as a result it cannot step down to be more compatible with slower SD cards. Although it should be mentioned that this is not that much of a problem since you can get class 10 microSD cards for pretty cheap nowadays.
Con No video connector natively
Must use RPIO equivalent to wire any video.
