Not the same company, I believe
Rock64 is from Pine64.org, while RockPi4 is from RadXa
I can confirm the problems you had with the Rock64. I bought this sbc to replace an aging RPi 3, mainly because it had a USB3 port and eMMC support. But as you also experienced, the user base is very small and the OS had serious issues. Also, I needed a powered USB hub to get stable operation from my ASI cameras.
The most stable (although not the fastest) platform I have used to date for INDI/Ekos is a Raspberry Pi 4 with the astroberry distro.

Read More...