W8MM:
mojeIme:

I though it had two motors in the front, one per wheel. So since only one is used, it has to have a diff up front as well right

I think the author messed up the details.  When I saw the presentation at Weissach, there were definitely separate electric motors for each front wheel.  They were contained in a common cylindrical housing, but there were two individual motors. 

He mentions torque vectoring and glosses over the requirement for individual front wheel torque control.  Too messy to add an e-diff when separate electric motors are easier to package and control.

YMMV

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Mike

Carrera GT + Tesla Roadster 1.5 + Panamera Turbo +  BMW Z8 + BMW 3.0 CSi + Bentley Arnage T + GT3 RS 4.0

My thought exacly