While I don't have the TZ5, given that it has 25mm wide-angle it will help to capture a bigger area of a page. I would think it is a better camera, with a Leica lens and all the photos users have posted. I've taken photos of documents with a very old (3 yrs old) panasonic p&s and I am quite pleased with the quality..
Hope this helps..
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Fuji F20 or any of the F series will work well for shooting document pages..
I've had good luck with an F20...
If you have reasonable light present, there probably won't be much difference at all between cameras. Shooting documents should be one of the simplest tasks for a camera, easy to focus, simple contrast. Pretty much anything will do fine, I doubt you could tell the difference until you got into something big...
As the previous poster said, almost any camera will be ok for reasonable light levels, so you might consider other uses as well..
The FUjis I mentioned earlier will excel in low light levels...
It's true that all compacts will focus close enough for document copy work. And nearly all have a "text" scene setting now. However, a superzoom still seems like a very odd choice for copy work to me. Take at least a look at the Nikon P5100, good macro, plus manual controls..
I tested multiple cameras for my dad who was scientist and bought him Canon Powershot 570 IS..
It does good photos of documents in Auto mode. But also good photos of various subjects in different situations (people, groups, landscape, macro).