The biggest difference in our design is the exclusion of all controls, buttons knobs and so on which means that even though the Keys device is about the same size as some of these other portable devices, the keys themselves are nearly the same size and layout ratios as traditional. In other words, full size keys not mini size which is hard to tell in the pictures. This feature, of both our personal opinions and the feedback of professionals we gave Keys to, is significantly more important than any other in a truly useful as well as portable keyboard.
The fact that all controls are removed and the design is purely keys also allows for the modular nature, and the ability to connect Keys together in various ways as well as other modules.
Each sensor sends on a separate control channel, and when linking multiple keys devices together, the control channels are transposed so adjacent keys sensors each send CC on their own channel (so each sensor is mappable, and in the same fashion for a given configuration of devices)