(you dont happen to be german by any chance?),
Grüße aus dem schönen Speyer in der Pfalz!
Isn't auto bracketing a newbie / convenience function anway? I might as well take like 6 shots and move the exposure each time or simply bracket by changing shutter speed in steps.
But you still have to touch the camera and it *might* move a bit. Also depends on your tripod's quality.
But as it was said: Yes, the Nikon might have the edge. A slightly bigger sensor and a newer generation.