I remembered I saw it on
another Weber site, hope you don't mind if I borrow your picture.
See the lip, I'm talking about? And the lack of tabs for the cutting board under your grate?
Mine doesn't have the lip and has the tabs.
My guess is, just a difference in the years produced, as they are both great. Mine is probably later, because it looks like a cheaper design with a single stamped piece for the top and, most likely, wood inserts instead of metal.