Well, it was a cockpit mockup with a functional wide angle MFD, side stick controller and instrumentation. It was not a simulator, but it was as realistic as any other cockpit mockup. However, the point is, the design of the front fuselage of the final prototype matches that of the Farnborough mockup.
Farnborough Mockup:
View attachment 103963
Prototype:
View attachment 103965
View attachment 103964
as far as details go, I think the difference you noticed is due to the low picture quality in the new pic.
Just a question, do we have a realistic profile drawing of the MMU's/TFX's current configuration?
I remember when the PAK-FA/Su-57, the Checkmate, the J-20 and J-35 all came out, immediately some artists began to draw profiles ... but not so here?