Glenn Faden has authored an excellent comparison of Solaris Trusted Extensions to the still-unreleased Red Hat Enterprise Linux 5 and it's LSPP policy. This is pretty technical reading but gives a good set of reasons as to why Trusted Extensions really are superior in many ways.

Check out the full document on Big Admin:

https://www.sun.com/bigadmin/features/hub_articles/mls_trusted_exts.jsp

Or if you're in a bit of a hurry, there's a quick summary at:

https://www.sun.com/bigadmin/features/hub_articles/mls_trusted_exts_table.jsp