Quite the contrary: if the _resource_ still exists but in the older site, the redirection will point the browser to the other location. OP's stratagem is doing

Quite the contrary: if the _resource_ still exists but in the older site, the redirection will point the browser to the other location. OP's stratagem is doing exactly what it's supposed to do (if the identifier of a page is its path and not the full URL of course)