There is no difference in the kind of redirection, the return code 301 is the same. The difference is related to the way ReDJ manages them and to performances. Here is a brief explanation...

A ReDJ rule is a regular expression, it was created to match many URLs so you can manage many-to-many redirections with a single rule, and this is powerful. I have seen that many (many) users like to use ReDJ also to redirect one-to-one URL, like in your case (e.g. a single error page to new page). This is possible but if you have a lot of these you will get a lot of rules and the query on rules cannot be optimized with indexes because of regular expressions support. So if you create ten thousand one-on-one rules you could have a slow response from the database. To avoid this I have created this second option. When an error occurs I can manage it, so if the error URL has a new URL associated I can redirect. And this is done in a very efficient way because the table is properly indexed over the source URL, so the query will get always a single row in the database, very efficient way to manage one-on-one redirection...

Hope this i s clear enough.

Kind regards,
Luigi

See you on the next 3d..