what is the difference between sudo and pbrun?

what is the difference between sudo and pbrun?
i have seen people executing pbrun sudo su - what this means?? i know su -
will try to switch to root user. what speciality pbrun gives to sudo when it is used along with sudo command?

pbrun is part of powerbroker server that symark and sun teams provides for advanced root privilege delegation and keylogging..
this application provides delegate privileges (usually root) to other users and log all events related all audits with advanced features and centralized all its.
also you can apply security policy your servers that is powerbroker agent.so pbrun makes everything via central (powerbroker) master host server..
you want to run chown or su command with pbrun on your host , pbrun sends to pb agent on master server and then master server recives this request and
processes this to according to policy files on the master server.if request is ok then master server returns "accept command information" to agent and
pb agent run your command.

and you can run sudo on solaris with your host also for run command as admin(root) or another user.

regards
ygemici

Thanks ygemici... that was really helpful. Thanks a lot