Consistency in throwing exceptions

Just observed that when throwing Exceptions, the step definitions use different syntax. Example:

throw new \Exception(sprintf('No such Drupal string: %s', $name));

throw new \Exception('No submit button at ' . $this->getSession()->getCurrentUrl());

throw new \Exception("Failed to log in as user \"{$this->user->name}\" with role \"{$this->user->role}\".");

throw new \Exception("No link to " . $link . " on " . $this->getSession()->getCurrentUrl());

throw new \Exception("$region region was not found");

Can anyone please suggest which one of the above is the preferable one?