Winter Acro: Mürren or Brevent ?

Wanna continue training acro this winter while speedriding/skiing. Thinking Lauterbrunnen or Chamonix. I do believe that the Brevent cable car is faster & allows for way more training laps than Mürren cable car as they seem to drop the frequency of rotations aus soon as there are not enough customers waiting.

Anyone got any real figures (Training laps/day) of either Brevent or Mürren ?