For comparisons of the Alliance and the Horde that aren’t relevant to the PTR and for discussing and comparing the past sins of Alliance and Horde characters, there’s always this thread that was made as a containment zone for such things.
As for some PTR stuff, it looks like the embassies will be getting portals that will grant all races access to all allied race starting zones. The Alliance wins out on this front, as they have more allied races with their own hubs and starting zones, while the Horde has more homeless allied races that just start off in Orgrimmar.
https://twitter.com/Portergauge/status/1803927604296323310