I found some answers to a few of the questions people have asked in this article (and explained below): http://mycameragear.net …non/canon-eos-7d-mark-ii/
Scatterbrained wrote in post #17156065
I don't think the sensor itself is going to be that different. The microlenses are claimed to be different, but that's all I've seen. It's the same kind of claim they would make every time they trotted out the old 18mp sensor in a new body.
It appears it is a new sensor for the 10 fps and the higher ISO.
pknight wrote in post #17156116
B&H has posted a video, in which they go out of their way to say that this is not the same sensor as in the 70D. Any chance they know more than we do?

Probably, see above.
nekrosoft13 wrote in post #17156189
electronic shutter is completely silent, zero sound.
i bet 7d will use electronic shutter in live view and possibly in "silent" mode.
SYS wrote in post #17156181
Can't find any information as to whether the 7DII comes with "Silent" shutter option. On BH site, it states "Electronic and Mechanical Type" in describing the shutter. For 5DIII, which comes with the silent shutter option, it states, "Mechanical Type." So what's the difference between these two?
In the same article above, it says "Canon has also included the "silent shutter" feature, also known as silent continuous shooting which will allow up to 4.0 fps in this silent mode."
So i'm assuming that it does have the silent shutter option.