I think I have been for long not posting shootout test and here it is, for my old cameras! ;-)
Measurbate and discover by yourself, for all the differences! Original photos are available for viewing by clicking the "Download" option per photo under album! :-D
https://www.flickr.com/photos/48733800@N06/sets/72157651768054944
EXIF data is available for all photos. Pairs of test shoots were taken at almost the same time for the same scene.
Lens used for A7R is a Canon EF35mm F2 (AE and AF adapted) and a FA645 45mm F2.8 for the 645D, for almost identical FoV.