The actual driving test is pretty much the same length and difficulty. (although I did the car test in France and the motorbike test in the UK) The French theory test needs a bit more preparation as more trick questions are asked. Also, the difference is perhaps, as far as I can remember, that French driving school offer more preparation to the theory test than is really required. In other words, they can keep you coming to the classroom until they are sure you will pass the theory...