What are the pros/cons of using a cferror tag vs. the onError method to handle errors?

I would like to set up an error page which will diplay a message to the user, have the error logged, and have an automatic email sent out to the website administ开发者_JAVA技巧rator in the event of an error. Which is better to use, a cferror tag or the onError method?

Application.cfm uses <cferror>, Application.cfc uses onError().

Application.cfc is the preferred method for current version of CF because it can do things that Application.cfm cannot. Therefore, one should use onError().