Why use SAP logging instead of log4j?

Hello,

We're porting our J2EE apps from IBM's WebSphere. Most of our apps are using log4j for logging.

I'm trying to figure out what advantages, if any, there are to converting to SAP's logging? It seems like an awful lot of work and I don't want to do it unless there are good reason(s) to.

Any feedback would be appreciated.

Thanks!