I have been told that factory brake controllers work in conjuction with the factory ABS. Just that alone makes the case for the factory brake controller. If you can see the 2009 Trailer Life Truck Guide there is a big story about brake controllers and the difference between types. Google the title and I am sure you will come up with it. You might even find the 2010 edition. Another thing is that with the factory controller you don't have any additional things poking out of the dashboard. I have the factory controller on my Silverado HD.
Art and Karen
2013 Itasca Sunstar 35F, 2013 Ford C Max toad.
170 nights in 2013
132 in 2014