It was done with a 50mm f/2.5 macro at f/8. You're kidding yourself if you think that lens at f/8 isn't sharp enough to illustrate any differences between AA and canceled AA sensors.
Exactly the same? No. Possible to tell apart at anything less than pixel peeping? I don't believe someone with 20/10 vision could pass that double blind test. I would complain that the 5DsR can show rough aliasing along edges when pixel peeping but in all honesty that's no more perceivable in print than any sharpness differences. There's very little to choose between them IMHO except that one is slightly less prone to full blown moire.
Good! Then you have RAW files to post so we can all see the difference and judge for ourselves if it's "big" or not. I hope I don't have to wait as long as I do for the DR examples I request from Sony fans