Both of those statements are controlling flow via an if statement. It's just a matter of how you handle the condition.
I'm always on the fence when it comes to writing logic statements like this. Part of me likes the first option because it's a little less code. The other part of me likes the second option because it's much easier to follow the flow of logic. With the first option, it's easy to miss the return statement which can lead to manageability issues in the future.
...and for that reason, the second option always wins in my book. It's better to write code that is easier to read and maintain than try to take shortcuts.
