Password Key provides many of the same features as the security built in to OS X, however, Password Key assists you in keeping more records of what is going on by adding many other features. It is not designed to replace the features in OS X, but it does help you monitor your system when you're away.

Feature
Mac OS X Logon Security
Mac OS X Screen Saver Security
Password Key 4.1
Rejects Incorrect Passwords
X
X
X
Provides Password Security
X
X
X
Allows Multiple Users
X
X
X
Provides Startup Protection
X
NO
X
Keeps Log of Login attempts
NO
NO
X
Records Date/Time of Incorrect Passwords
NO
NO
X
Records incorrect passwords in Log
NO
NO
X
Reports Previous Activity after Login
NO
NO
X
Can be run when leaving computer
NO
after timout
X
Single or Rotating Color Background
NO
NO
X
AutoStarts after Idle Time
NO
X
OS 9 Version