iWork is not always compatible with Office. But then again, Office is not always compatible with Office either.
More specifically, Pages oftentimes does whatever it wants with formatting of Word documents sent over from the PC side. Line spacings go awry, pages get shifted, empty pages appear, with no easy way to fix the document to restore the way it originally looked.
Office for Mac preserves formatting of the same documents much better.
Ideally, I would get both Office and iWork. If you have to chose only one, then Office would be my vote.
More specifically, Pages oftentimes does whatever it wants with formatting of Word documents sent over from the PC side. Line spacings go awry, pages get shifted, empty pages appear, with no easy way to fix the document to restore the way it originally looked.
Office for Mac preserves formatting of the same documents much better.
Ideally, I would get both Office and iWork. If you have to chose only one, then Office would be my vote.