What's the difference between the MT - 2 with red words and orange words?

Thanks for the info! So this means there are 3 versions of the BOSS MT - 2 pedal. Mine is most probably version 3, as its from Oct 2003.

Maybe i'll have to open it up one day to check out its IC chips.

Can't find a comparison of the difference in their sounds. However, it doesn't really matter so much as long as I like my pedal :]