Microsoft Update vs. Office Update

Office 2003 SP2 Update

To make a long story short, after numerous attempts to install the update
(download was ok) I finally installed it successfully using the Microsoft
Auto Update. After checking for updates using Microsoft Update location, Msg.
says: No high priority updates for your computer are available. History shows
Office SP2 installed successfully on 9/29 via Auto Update.

When using the Microsoft Office Update location, I get the following:
Required Updates: 1. Download size: 0KB. Download time: 0 min. Office 2003
SP2 already downloaded.
Already installed Office Update info does not show SP2 as being installed.

Which Update should I believe?