Regular version - March release, 5,040 Yen (inclusive of tax).
The face can be adjusted, allowing a change in the position of the eyes.
No part swapping for the GN Short and Long Blades' mount racks on the hip.
The new "Zero Gravity Base" allowing a much more flexible and wider angle of posing for Exia. Seems to be utilizing some sort of feature on Exia feet to achieve that.
DX Ver. [Repair Set] - March release, 7,560 Yen (inclusive of tax).
The Repair Set has the same features as the regular version, with a change of the color, and comes with parts to convert it Exia RE as seen in Episode One of Season Two.
Images and information from Bandai Hobbysite.