The iHome iP15 is the upgrade to the iH15. This generation also offers the 7 different color changes but with more modes: the same slow-paced, fast-paced, single color and no color, plus now: pulse to the music! That's my favorite part of this system, and another difference from it's cubed counterpart is its sleek dome-shaped design. The subwoofer also provides high quality sound! The visual is the ultimate added bonus that sets the mood!