A pros & cons list of each application might be a good idea. But I also think that each app is almost too different from its MS Office version. For Mesa, this might be an important thing (the pros/cons list), but I'm not much of a spreadsheet user, so I can't accomplish a good list for it.
To include ThinkFree Office would be strange, as this wants to be an alternative on itself, and I don't count the Java based apps to the 'clean Cocoa' apps, mostly because the interface slowness doesn't make them great alternatives to Carbon based applications. (They have advantages of their own, of course, x-platform mostly.)
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