I'd liken the difference to be between that of the Crusader and Piranha shotguns in ME3...
Anyway, a little blink and you'll miss it scene - the entrance to the 74th floor dungeon is
exactly the same as the Treasury of city of
Petra. Heck, floor 74 looks to be a shout out to Petra, given that the main area looks alot like the Cordo Maximum.