Indeed. Furthermore, JSON readily differentiates between a single element {a: 'hello'} and a vector with one element {b: ['hello']}, as do most programming languages. XML does not, which leads to weird constructs like <Names><Name>a</Name></Names> to indicate that more than one name is possible. (Except .. if you actually use a schema with your XML parser, that indicates more than one is possible. But almost no one does). JSON also differentiates numbers from strings, etc.

As a result, in my experience, JSON tends to be more robust in real world use - even when a schema is available.