I visited both during one of our last trips. I really did not care for Marakesh although it was a nice experience. The entertainment and surroundings were very authentic, IMHO. However, I did not enjoy the food at all. Everything was dry and tasteless. My boyfriend loved it though. He had a lamb dish or two and I did not as I don't like lamb.
Le Chefs de France is a fantastic place to go. We went there during our Christmas trip and really enjoyed it. You can't go wrong with a meal there. The wait staff is incredible and the manager was very accomodating when we confused our ADR time. We originally had one time (a part of the Candlelight Processional package), but changed it and I forgot. lol. They were amazing at getting us in and out before the show. The food was wonderful!