TL;DR: All available H3 boards do not differ that much. But the few differences sometimes really matter!
The following is an attempt to compare the different available H3 SBC that are supported by Armbian. The majority of boards is made by Xunlong but in the meantime two more vendors started cloning the Xunlong boards (and also Olimex is preparing H3 boards as OSHW). Both Foxconn/SinoVoip with their Banana Pi M2+ and FriendlyARM with their NanoPi M1 tried really hard to copy everythi