Because different board revisions use different memory chips—for instance, the V2.2 revision uses a specific Samsung eMMC that requires its own unique bootloader chain—the risk of bricking your device is high if you flash the wrong firmware. The Q6x V2.3, in contrast, is more flexible and can run the common, widely available stock firmware found online.
The Q6x V2.3 designation refers directly to the hardware board revision of budget Android TV boxes running the . This board revision is notoriously complex due to a split in how memory allocations are handled across global manufacturing chains. Q6x V2.3 Firmware