The hive are the mindless kinda cavedigging creepy bastards who just wanna kill shit. Maybe eat it. But the vex have the capability to turn a planet into a machine even a wepon. And their knowledge of technology expands past that of a guardians. And if you think about destiny. It's go here. Put your ghost in that hoe and get the info. Because knowledge is power and technology is key. They seem to be winning the war on all that compared to cabal or hive. Even if they do pose more as some bad mofos in battle.