Weber 36" Rust resistant vs Slate 36" line?

So the rust resistant line is currently 499.00 USD on amazon and the slate line with same 36" is currently 999.00 USD (although its currently unavailable). Everyone here is saying the Slate line has a much better build quality and I can see that. It also has a few extra features that the rust resistant line doesn't have. But is the Slate line really worth twice as much as the rust resistant line? What do you guys think? Looking to purchase the 36" since I do plan on using it when family or friends come over.