Went to Samys here in La to pick up the Sony 43 flash works a charm. Anyway I actually talked to someone that knew something. From the reps mouth the A7r is NOT the same sensor as the D800e it's 3 years newer and specifically designed for this cam and the new processors and image chain. Honestly just looking at the files I never thought it was myself. To me it's actually better.
Thought I would share that