The document compares two single board computers, the Raspberry Pi and Radxa Rock. It notes that the Raspberry Pi has 1GB RAM, 1.6GHz CPU and built-in storage and WiFi, while the Radxa Rock has 512MB RAM, 700MHz CPU and requires an SD card for storage and lacks built-in WiFi. It also mentions the Raspberry Pi has over 100,000 users and 31 million Google results, while the Radxa Rock has 2,500 users and 150,000 Google results.