What is the difference between the [logit][1] and the [probit model][2]?

I'm more interested here in knowing when to use logistic regression, and when to use probit. If there's any literature which define it using [R][3], that would be helpful as well.

  [1]: https://en.wikipedia.org/wiki/Logistic_regression
  [2]: https://en.wikipedia.org/wiki/Probit_model
  [3]: http://en.wikipedia.org/wiki/R_%28programming_language%29