how to tell civic jdm and usdm clocks apart?

is there really a difference? do they light up differently? i have a ns one and a jeco one. the ns doesn't have a made in blank anywhere and the jeco has made in japan on the back. both have the same color leds.

i thought the jdm ones are amber?

jdm = amber lighted
usdm = white lighted

I think the white light is kool. No other car clock is like that. :)