The key difference is that Dynochem predictions are based on a kinetic model, which allows great flexibility in determining the behavior of your process in different equipment setups, and thus allows the optimization of a safe process in silico. In comparison,
iC Safety is based on determining standard metrics like MAT and DTad from RC1 data and using this to determine the Stoessel safety class. It won't directly allow you to predict, for example, what conditions would allow you to run the process safely when transferring to a large-scale vessel. The two approaches are complementary, however, and both are very robust!