When comparing Raspberry Pi Zero W vs Onion - Omega 2, the Slant community recommends Raspberry Pi Zero W for most people. In the question“What are the best single-board computers?” Raspberry Pi Zero W is ranked 6th while Onion - Omega 2 is ranked 44th. The most important reason people chose Raspberry Pi Zero W is:
This is a complete desktop computer with wifi, hdmi, and bluetooth powered by an arm chip. All you need is your existing peripherals, a micro usb dongle, and a sd card to make it run.
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Pros
Pro Very cheap for what it is
This is a complete desktop computer with wifi, hdmi, and bluetooth powered by an arm chip. All you need is your existing peripherals, a micro usb dongle, and a sd card to make it run.
Pro Large community
The Raspberry Pi is backed by a large community of experienced users that are willing to help and has a lot of documentation.
Pro Embedded WiFi antenna
Pro It's tiny
Pro It has lots of shields available, including Arduino shield
Cons
Con No onboard storage
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.