I think the 718s are really engineered to perform with the PDK transmissions. They are also fastest in that configuration, and it best suits the nature of the high-tech engine.
It seems a little strange to test the TT with DSG (and, I presume, an LSD), a M2 with a stick (and an LSD), and a 718s with a stick and no LSD--and no Sport Chrono.
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