Open schematics and kernel source. Publicly available SoC. If you want a one-off for a little hobby project, then RpiZ is just fine. If you are developing a

Open schematics and kernel source. Publicly available SoC. If you want a one-off for a little hobby project, then RpiZ is just fine. If you are developing a commercial product and don't want to be at the mercy of RPi or Broadcom for your parts and availability, you go with something like BeagleBone.