A:Answer Hello Cesar, great question! The SoundTouch 20 and SoundTouch 30 systems are identical in function but vary in output. The 30 is our most powerful all in one Wi-Fi and Bluetooth enabled speaker, it is engineered with 3 built in speakers, one specifically designed to enhance bass response. The 20 is great for any room in your home where you'd like rich, detailed sound without taking up a lot of space. We even sell the SoundTouch 10 (http://bose.life/1UfzUSu), the 10 is our most compact offering, I have one on my kitchen counter and really love it. Have a great weekend!