Here's some recent observations of mine regaring office suites - particularly the word processing components.
I just created a two-page, table-intensive document (if you don't mind a bit of geekiness, the document is
here - the missing borders on some of the cells is a result of PDF'ing the document... the source doc has all the borders intact) and tried to work with it in Word v.X, AppleWorks 6, and OpenOffice 1.0.3.
As far as GUI/look and feel/human interface is concerned, Word v.X takes the cake. Having fully embraced Aqua, it is a beautiful application. As far as looks are concerned, neither AppleWorks (which still has remnants of MacOS 6-7 throughout) nor OpenOffice (which keeps the X11 interface) can stack up at all.
The document was originally created in Word v.X. Opening the document in AppleWorks resulted in different colors of shading (yellow instead of grey), one table per page (instead of multiple tables over two pages), and rotated text becoming oddly unrotated. Tables, rows, columns, and individual cells all lost their sizing, and often appeared stretched out two to three times their size. Opening the document in OpenOffice was much better, save that the font types and sizes were altered, and the rotated text was made unrotated. I absolutely could not correct the document in AppleWorks, and was able to correct it after many tries with OpenOffice.
As far as speed is concerned, AppleWorks seemed to be a bit snappier than Word, but OpenOffice had a REALLY slow load time - it has to load up the X11 environment, then all the X libraries, and so on, and so forth. Once it was running, however, it seemed to keep up with the other two.
All things considered, so far my money is on Word v.X. The only problem I had with Word was that it just up and crashed twice while I was working with it, and the other two did not. Both times it crashed were directly after doing print previews, and I have no printer installed in my system. When I stopped doing the previews, or started again after installing a printer, Word did not crash at all. So beware of that, Word users.
Tim.