When comparing Radxa Rock2 vs BeagleBone Black, the Slant community recommends BeagleBone Black for most people. In the question“What are the best single-board computers?” BeagleBone Black is ranked 22nd while Radxa Rock2 is ranked 43rd. The most important reason people chose BeagleBone Black is:
There are 92 expansion pins, with 46-pin female connectors on both sides of the board with other 6 serial pins to be used for debugging.
Specs
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Pros
Pro Built-in Bluetooth
Has a built-in Bluetooth module. Meaning there's no need to buy one.
Pro Built-in Wifi wth antenna
Has built-in Wifi capabilities.
Pro Can dual boot Linux and Android
Other than supporting several Linux distros along with Android, you can also choose to dual-boot both.
Pro Provided with a clear plastic case
Comes with a clear plastic case included in the price, which is pretty useful for most projects people would use a SBC for..
Pro Extendable hardware
There are 92 expansion pins, with 46-pin female connectors on both sides of the board with other 6 serial pins to be used for debugging.
Pro On board storage
Has on board integrated storage of 4GB. It can also have an SD card in addition to the integrated storage and can boot from either of them.
Pro Programmable Real Time Units with GPIO control
Real-time coprocessors allow for embedded systems control and bit-banging communication
Pro Analog Inputs
There are 7 1.8V analog inputs.
Pro Responsive, helpful online community
Pro Easy of use
It hosts a web service over USB so it is super simple to get started with plenty of source code and examples available.
Cons
Con HDMI has some problems on Linux
The HDMI port has some issues on Linux, fortunately these issues are not present when using Android.
Con Only one USB available for peripherals
There's only one USB port available for peripherals, which is a bit annoying considering how two USB ports is a minimum to have a keyboard and a mouse hooked up without having to use a powered USB hub.
Con Lack of a proper OpenGL driver
It sounds like the driver is possible, but the information is spread out over forums and GitHub.