So I was finally able to get ahold of a grey copy of Wcw backstage assault the USA version not the Msa version see photos below the boards are different. If someone has a copy of the MSA version could you snap a photo of the board so we can compare.
Pics below
Notice that the boards are different colours the chips have different codes on them.
Grey and blue
Rear
Grey has 11 stamped in the back and blue has 19 on the back label
Grey front
Grey back
Blue front
Blue Back