Definitely the pictures out of the Leica look oversharpened, still the M8 seems to be able to produce slightly more detail, how much of this is due to the fact that he compared a zoom lens with a top of the class prime, and how much to the absence of the AA filter in the Leica is not easy to judge.
He should have used the Canon 85mm 1.2, a lens quite popular with portrait photographers, which on full frame gives a field of view comparable to the 75 cron on the m8.
Also for some reason he cut off 20% of the sensor on the 5D, thus negating any advantage due to the bigger sensor.
I am sure if you take a 10d and a 5d and compare them negating any pixel advantage of the 5d you'll find that they are very similar cameras.