We have continuous arguments in our office about the superiority of one word processor over another. In general, there is very little difference in capabilities as seen by the average user.
All packages have a great similarity of functions.
This is because they all use the same Windows interface. The most widely seen word processor is MS Word. This is because it comes as standard software on most office computers. Also, for any office with several computers, the expense of switching software is significant. In addition, differences for the basic functions are not major.