Limitations of catchTag in extending Error class

class JsonParseError extends Error {
  readonly _tag = "JsonParseError";
  constructor(readonly response: Response, message?: string) {
    super(message);
  }
}

class JsonParseError extends Error {
  readonly _tag = "JsonParseError";
  constructor(readonly response: Response, message?: string) {
    super(message);
  }
}