So from my own research, I'd want to make sure that the cable and the connector on the display have the same number of pins. and display to display have the connector in the correct location/orientation. Since you already confirmed bios versions to be identical, you should be in the clear.
Currently, building a GT60, from scratch, have to love MSI for using the same boards across both series. Only differences I have discovered so far, are cables. and bezels, and display. If you know any one with a bricked GT60/GT70/or Rebrand, it's worth the money to pickup, a few minutes of rework for a chip replacement, can turn into some great profits.