I think the fact that Louis Erard makes their own regulator module is the difference. In the video on their website, you can see a watchmaker at Louis Erard lay a dial on top of a movement and see just how much bigger the dial is.
The watchmaker I regularly use, Jacques, has become very picky about what he works on. I have a LIP that I love with an old Durowe caliber, but am wondering where in the world will I find someone to service it. Maybe I just need a new watchmaker... I do love the crazy AS dials, but day to day, this