I heard the blue GGs were a hardware revision to improve the quality of the capacitors but I don't know if there's truth to this. (Speaking of the US Blue GG releases.)
Japan has a variety of GG colors like yellow and red. There are also special packages like the Coca Cola version and the red GG packed in with Magic Knight Rayearth. I wonder if ANY of the Japanese GGs were revised internally to address the caps issues?
I figured it's worth knowing this, so that in the future I can choose an adequate model and look up the info I need about cap replacement so I know what to expect.