Torn's right, I was speaking of the CaseIH version of the ViperPro.
CaseIH ViperPro: needs unlock for variable rate, does have special software to run a CaseIH Flexair spreader truck. Otherwise the same as a Raven ViperPro.
Raven ViperPro: comes with single product variable rate standard.
Both can: have streetmaps, multiple product control, multiple product variable rate, external weatherproof slaved lightbar, ect