that was my first thought as well... BUT...
my stock 93 Si gauge face and the 94-96 (i think 94) Si EL gauge face aren't identical. The backs of them do not look the same... the translucent patterns are different, etc... ( i guess the cold cathod tube light emitted requires different pattern? who knows)
point is.. they obviously re-designed the gauge face itself, so why leave the top right corner '4ws' area translucent? they could easily have blacked it over like the majority of the gauge face. Of course the light would still be there since it is built into the white plastic housing of the gauge fixture but you wouldnt see it.
i dont know.. just rambling and wondering.. sometimes i'm too curious
i'm doubting they left it there just in case those with 92 4ws equipped cars could do the swap