Different strokes for different folks
Why have more than 1 kind of Ford? (heck - why have any now I think of it!) - because the different systems work for different needs.
Personally - I havent used any other but me own (though I did test v3articles to write the import script).
The biggest difference between Cinq's version and mine is our implementation. His is to create an article system that stood alone but linked into vb3. Mine was to create a system that was integrated so that it ran totally off vB3 and so it would integrate with the forums (like searching and such).
I think Cinq has done a great job and Im pretty chuffed with the job I have done. Once again I think it just comes down to the implimentation and how you want to use the system.
HTH's