I'm principally a transactional attorney. The one piece of software that keeps me tied to Windows in addition to Word is Workshare Compare. To my astonishment, even after jacking prices after the recent acquisition by Litera, there is literally no substitute for elegantly and cleanly preparing redlines. This cannot be that difficult. Somebody build a competitor!
Word's built in compare feature works fine these days, in my experience. It handles changes/moves pretty well now too. Assuming your employer has a recent version of Word, not an ancient one because that's what works with all of their wierd doc formatting macros.