You should understand that DJ designed both boxes. The workers on the DJ production line can make either. The maps can't be swapped, but you can cut and paste the cells from one to the other (pc3USB is an exception since the cell increments have changed).
The EMS has an expansion hub that allows additional features to be connected.
It however, does not work with the DJ Tuning Link software....and custom maps do take a bit longer to create.
Yoshimura will release their next product shortly, "The Cube". I'll be waiting to get this on the dyno for testing.
