Side by side comparison tool

[volarium]

This is a long shot, but is anyone aware of a pre-built application that allow you to host a database of products and allow users to show a side-by-side comparison based on their selection?

Here are two examples:
http://www.dpreview.com/reviews/sidebyside.asp
http://www.olympusamerica.com/cpg_section/productcompare/productcompare.asp

It doesn't necessarily need to work with vBulletin.

Thanks.