When comparing Onion - Omega 2 vs ESPRESSObin, the Slant community recommends ESPRESSObin for most people. In the question“What are the best single-board computers?” ESPRESSObin is ranked 19th while Onion - Omega 2 is ranked 44th. The most important reason people chose ESPRESSObin is:
It has three Gb ethernet ports.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro It's tiny
Pro It has lots of shields available, including Arduino shield
Pro 3x Gigabit LAN
It has three Gb ethernet ports.
Pro Das U-Boot bootloader
It uses the opensource boot loader "Das U-Boot".
Pro Fast SATA III port
Pro Mini-PCI-E slot
Few SOC boards have this feature--and there are a couple Mini-PCIE RAID cards on the market that might work nicely
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 Only one SATA port
It has only one SATA port.