YSH is a signature restaurant, more upscale dining. The tables will have white tableclothes, the servers will be wearing white shirts with bow ties. They have a menu of aged cuts of meat, a decent wine list. Sides are ala carte. Service will be paced accordingly.
Captains Grill is a casual dining place. It will be similar in atmosphere, food and service to a chain restaurant like Red Robin, Appleby's etc.