They don't say who makes the SOC, just "1.2 GHz Quad-Core ARM Cortex-A53 CPU", which is a lot higher spec than the GR8[1] used in the prototype.
This has implications for mainline kernel support etc.
So, maybe something like the Allwinner H5?
[0] https://community.popcorncomputer.com/t/popcorn-web-tools/10...