At ZDNet, Christopher Dawson compares NeoOffice vs. OpenOffice vs. Office 2008 vs. iWork. He obviously comprares them on Mac OS X, as GeoOffice or iWork and Office 2008 are special releases for the Apple Mac platform.

His report is influenced by his experience managing the IT for a school in Western Massachusetts. Chris concludes:

iWork is very slick and integrates well brilliantly with iLife. It’s easy to use, but powerful enough for serious users. However, it’s lack of compatibility with open file formats is of concern. Office 2008 is also slick and highly functional but not nearly as effortless to navigate. Even with academic pricing (iWork is priced around $10/license academic versus almost $70/license for Office), Office is a bit pricey and hard to justify when cheaper or free alternatives exist. OpenOffice for the Mac really isn’t worth a second look right now given its lack of integration and compatibility. NeoOffice has its niggles, but is generally a solid, easy to use office suite. Even if you choose iWork of Office, it should be installed on all of your users’ machines to ensure compatibility with their students. It could certainly stand alone, as well, but the relatively inexpensive iWork is a hard bit of kit to pass up.