TouchMe is designed for two objects or two people. When the intensity (area) of the touch changes, the pitch of the note changes. You can choose the key and frets to adjust to the composition. Playtron is created to play on up to 16 objects; each has its note, which does not change depending on the touch. This way, you can make a musical keyboard from any conductive objects. TouchMe device is more of a sensory music gadget where the pitch of the note changes depending on your touch's intensity, while Playtron is making a keyboard out of conductive objects.