EP330 is less upkeep, with porcelain coatings. To me, the black looks better for some reason, but that's just a personal choice. The S330 is a beautiful grill though for sure.
I have a 330. The Genesis Espresso Porcelain Enamel. It's sort of a lite-chocolate color. Love it so far. Except for the wheels that won't roll anywhere but on cement.
The wheels are strange huh? They have a piece of plastic that comes down nearly to the ground which makes rolling the 330 a task on anything that's not perfectly flat. I see a wheel mod in my future