When comparing Onion - Omega 2 vs Rock64 (4GB), the Slant community recommends Rock64 (4GB) for most people. In the question“What are the best single-board computers?” Rock64 (4GB) is ranked 2nd while Onion - Omega 2 is ranked 44th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro It's tiny
Pro It has lots of shields available, including Arduino shield
Pro Gigabyte ethernet
Pro USB 3 Bus support
Pro Can have up to 4gb of low power RAM
Pro eMMC
Pro Beats Raspberry Pi on price and performance
Pro Main header Pi 3 pin layout
Can use Pi shields.
Pro Runs Dietpi Debian loads well - MUST use the PINE64 Installer for software loading
Pro Barrel power connector
More rugged connection. Less likely to be damaged.
Pro 4K/60h hdmi 2a
Pro Extra Gpio pins
Cons
Con Not breadboard compatible
The board does not have the standard 2.54 mm pin spacing.
Con Support issues
There have been long-lasting periods were everything grew stale, even when it was about fixing security issues etc. have given up on checking since it was frustrating.
Con Expensive
It has less than 256MB of RAM.
Con Power connector is not MicroUSB or MiniUSB
Can't use power banks as a power source because of that.
Con No on-board Wi-Fi or Bluetooth
Con Lack of support, Unstable USB 3,
Only Android with TV UI is available. It is almost unusable with a touchscreen display.
Community is somewhat helpful but is very small. The board developers do not participate in community discussions. No regular Android build available. Lack of accessories and project guidelines.
Con Lack of accessories
