Business Elite. With the Elite x2 1012 G1, HP takes on Microsoft's Surface Pro 4. The convertible offers a keyboard dock, an active stylus and an LTE modem. At almost 1500 Euro (~$1690), the complete package doesn't come cheap, however.
http://www.notebookcheck.net/HP-Elite-x2-1012-G1-Convertible-Review.164293.0.html
The battery capacity of x2 1012 is 40Whr, but not as in this review as 37Whr
It would be great if you can add Huawei Matebook in this review.
I'm impressed by the thoroughness of your review!
But what I'm looking for is: How does the notebook communicate with the keyboard?
I'm guessing that it's over Bluetooth, which, if true, would rule out the notebook for me...