I think a lot of people ITT are thinking about wrestling as in WWE wrestling, no actual wrestling.
The correct answer to the question, as posed, is wrestling and it's not even close. There's a reason wrestlers dominated the UFC for years and years and years, until the strikers at least learned how to counter-wrestle. The wrestler can dictate where the fight takes place. The boxer isn't gonna have a good time if he's put on his back.
If the question is which do I enjoy more, then it's boxing. But if it's which one wins the fight, it's wrestling every time.