Yes, the risk is higher in term of having to eat the cost.
I never do jobs on Morton or Ruth Chris, but have done other dine in restaurant like steakhouse, fancy bar visits. IMHO, they are easier to fill the form than fast food. Most of them, if not all emphasize on services, ambiance of the dining area, taste of food. I can relax, enjoy the evening and does not feel like I am working while paying attention to what I need to observe. Fast food is all about timing down to the last seconds and some other small details, which can be very tricky for someone who is new on the job. FF is not healthy so I try not to do them too often
I never have problems with these restaurant jobs, but I do write a pretty detailed narrative.