Juggernaut: Huge phat low mids and a present but tight and rolled off low end. A more tapered and smooth high end. It sounds phat and huge but not boomy. Has lots of lows but not sub lows, if that makes sense.
Nailbomb: Super tight and rolled off in the lows. The lows are deep but really clear and tapered with emphasis more in the high mids instead of the low mids. The highs and pick attack are really gritty and grimey. Not much low end compared to the Juggs.
Aftermath I can't comment on but I'd imagine it's brighter and less phat than the Juggernaut.