The pdfs of the first practice session are online:
http://www.lemans-series.com/fr/s52_...php?circuit=23
There is a difference of 10 km/h in top speed between Peugeot (300 km/h) and Audi (290 km/h).
The #2 Audi drivers are quite a bit slower than their collegues. See
http://www.lemans-series.com/fr/s52_...&id_circuit=23
Lamy's best lap was almost 2 sec slower than that of Dirk Werner.