While both headphones offer noise cancelling in an in-ear headphone, QuietControl 30 headphones have the added benefit of controllable noise cancelling, which allows the user to adjust the level of noise cancelling. The neckband design is comfortable enough to wear all day. The headphones offer volume-optimised EQ, which ensures Bose quality audio at all volume settings. In addition, QuietControl 30 offers features like a dual-microphone communication system, voice prompts and intuitive controls. All of these features come in a convenient, wireless headphone. QuietControl 30 headphones do not have a wired backup for either noise cancelling or passive audio, so they cannot be plugged into in-flight entertainment systems like QC20 headphones can.