With regard to the PRUs, I don't think the BB Blue has anything the BB, BB Black, and BB Green don't. They all have the PRUs. It's a function of the AM335x Cort

With regard to the PRUs, I don't think the BB Blue has anything the BB, BB Black, and BB Green don't. They all have the PRUs. It's a function of the AM335x Cortex-A8 SoC. At this point, you need a time machine to get a BB Blue, anyway.