This mod is focusing on rebuilding the glory of the guild, as well proving you have rightfully earned your title. A Brotherhood Renewed focuses on reclaiming the lost sanctuaries which is mentioned by one of the various loading screens. Do note that the two mods are focusing on different aspects of the Brotherhood.
Seeing a familiar face again and race against time to stop the traitor (yeah, there’s another traitor in the midst) from destroying what the brotherhood completely from within. Especially with how the speakers are questioning whether you are worthy of your position as Listener. I personally found this mod much more engaging than A Brotherhood Renewed in terms how the story-line and quests progressed. You are summoned by the council formed by speakers hailing from different provinces of Tamriel to rebuild the broken guild back to its former glory. The Return of the Dark Brotherhood (RoTDB) focuses on the aftermath of the regular dark brotherhood quest-line.