>From personal experience: Steamboat . . . (huge gap) . Giantess (superduper strong ones) Splendid (70s -they were LOUD) Africa pre explosion Beehive Mortar . . Castle Giantess (average steam phases really aren't much louder than Castle) . . Bijou Porkchop in wild phase Clepsydra's Steam Vent Lone Star All others are just different levels of nicely noisy.