Hi, Both are stable releases, it is just the two most recent that we have on the page.
I'm curious to see why there's two firmware versions on the download page for my N2048P, with versions marked as current/latest. Version: 6.5.4.4 ,A47 with Release Date: 28 Jun 2019 and Version: 6.6.0.2 ,A00 with Release Date: 03 Jun 2019 I assume one version is a Stable release and the other one is for Early/preview but I'm not sure which one is which. I'd prefer to stick to a Stable release. If it helps,the currently installed firmware version is 6.3.1.8. Does anyone know which version is the stable one? or Why there's two latest firmware versions? Thanks,    
N2000 firmware type