The PC Engine Duo-RX is the same as the Duo-R, except that the RX has a slight blue tint to the case and was packed in with a 6-button controller similar to that of the PC-FX.
Page Credits
Michael Collins:
Page Design, HTML Code
Eddie Herrmann:
Perl Script
David Murnan:
PHP Script
ApolloBoy:
Title Addition, Overview, variation type, part number