If you are really just looking for changes and change comparison's check out
Kiwi Cat tools..
This software can connect via SSH, Telnet etc, and even do non-Cisco, Linux etc..
Works good as a backup for configs...
CiscoWorks also polls the devices for configuration changes and generates
a diff if you so desire. If you have set up AAA you will have an audit
log of when changes were applied and who applied them.
Scott C. McGrath