What is the difference between the Logitech Quickcam Commuicate STX and the Lgtch. Qkcm. Communicate STX Plus?

I can't find a Vista download for my Logitech QuickCam Communicate STX (or Plus)---I can't describe what my webcam is.

What is the difference between the Logitech Quickcam Commuicate STX and the Lgtch. Qkcm. Communicate STX Plus?

The webcam is QuickCam Communicate STX. Plus is a package of the webcam AND a headset (behind the d¨|colletage type), and a free copy of Skype so you don't have to download it.

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