Why would you treat the two differently, though? What benefit does it bring? (defer is such an ugly, manual solution in general; it becomes very cumbersome once you may want to give control of the resource to anyone else.)
Not really obvious, given that there are garbage collected languages with RAII, like D, to quote one example.
And even stuff like try/using/with can be made RAII alike, via static analysis, which defer like approaches usually can't, because it can be any expression type, unlike those other approaches that rely on specific interfaces/magic methods being present, thus can be tracked via the type system.
So it can be turned into a compiler error if such tagged type doesn't escape lexical scope without calling the respective try/using/with on the variable declaration.
