Is there an anti-spam advantage of using reCAPTCHA module instead of just CAPTCHA by itself? What is the advantage of using the reCAPTCHA module over the plain old CAPTCHA module?

Are spam bots less likely likely to beat reCAPTCHA?

Thanks
The biggest advantages of using reCaptcha is the built in support for people who are visually impaired and the ability to evolve without your intervention. ReCaptcha continuously changes to fight of spam bots.