Thank you for the quicke response and the clarification.
When looking thoroughly into the problem myself, not only relying on someone elses opinion, I agree with you. It is the same layout but there is one remaining question.
Just some background. We are not using Allegro/Orcad suite at all. But DxDesigner and PADS from Mentor. We got help from our tool chain supplier to convert the schematic and layout.
The layout, at least how it is setup in the PADS now looks like the picture, 1mm thickness.

Could something have been "lost in translation"? The stackup is cruical to high speed simulations which I assume you have done? Could you share your settings?
Physical sabre board is 1.6mm thick. This worries me.....
rgds,
Stefan