sort is to indicate in what order the huds should be drawn (aka put before or behind other huds) (i dont know if higher number = foreground or lower number = foreground, try this yourself)
archived = visible on killcam yes/no. Also applies to spectator (if you set archived to false, spectators cant see that particular hud). Im uncertain what happens with a non-archived hud as a personal hud for a spec, archived only applies when you are speccing a player