Both are demanding places to work. The big difference is "Fear vs. Safety" At SpaceX if you identify a problem you are not afraid to let someone know, because

Both are demanding places to work. The big difference is "Fear vs. Safety" At SpaceX if you identify a problem you are not afraid to let someone know, because everyone is working together to make the mission a success. At BO if you identify a problem you will be afraid to let someone know because they may blame you for the problem or criticize your risk tolerance.