A fourth concept in the RPMs lineup, with no fancy name - just called 'Lights and Sounds'.
The first two are the standard Optimus and Bumblebee characters, and have the same level of conversion as the Minivehicles (stand up the vehicle mode to reveal the robot detailing underneath).
http://www.bwtf.com/node/1229
I'm thinking they are probably about deluxe size.
