> from what I can tell Starship is just a bigger version of the Falcon 9 second stage I know I'm piling on here with this quote but I just don't understand why

> from what I can tell Starship is just a bigger version of the Falcon 9 second stage I know I'm piling on here with this quote but I just don't understand why you'd say this if you'd done the least amount of research. They are about as different as two rockets can be—do you think Starship is "just a bigger version" because it's an upper stage? Because it's built by the same company? Its design and (theoretical, until it flies) capabilities are radically different and expanded relative to F9 stage 2.