This is my 3rd Weber gas grill, they made the right side shelf is much larger which is nice. Additional storage on the bottom like a small closet.  This one has the ss grates and my other ones have cast iron grates. I am finding out that I like the ss grates better they seem to easier to cook with and keep clean. The warming rack can fold out to double the space and fold away when not in needed that is a nice idea. There were some issues with the grill just cosmetic, called Weber and they sent what I needed no questions asked plus they have a great warrantee.  I still have my first one from 30 years ago, a great product that is built to last so Why would you buy anything else?