Best practice to handle API HTTP response

Hi,

When you call a REST API and have such a reply below. How would the best pratice to cast the response to a CDT please ?
Do you consider this ER must always return a generic CDT reply (solution A),
or do you consider this ER must return 2 different CDTs according the reply, but in this case, we would have to handle a condition (Solution B)

Response Ok from API :

body: {
  "id" : 1212
  "url" : "https...."
}

Error Response from API :

body: {
  "developerMessage": "file already used",
  "errorCode":102
}

Solution A :

type!response(
  OK: {  /* Filled if OK */
    id : 1212
    url : "https...."
  },
  ERROR {  /* Filled when Error */
   developerMessage: "file already used",
   errorCode: 102
}

Solution B : 2 different CDTs

type!errorResponse(
  developerMessage: "file already used",
  errorCode: 102
)

type!response(
  id : 1212
  url : "https...."
)