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Metal forming is complex; hence conducting computer simulations with reasonable turn around time requires a number of assumptions and simplifications of the physical reality. Since a number of commercial software codes are now available for metal forming simulation, it is very important that the underlying assumptions are well understood. It is not a simple case of one code being “better” than another; rather it is to understand the results and to apply them effectively. The goal of this investigation was to compare the simulation results between a full bending formulation (FBF) code and a modified membrane formulation (MMF) code, with particular emphasis on how friction should be “treated”. The strategy followed was to simulate the stamping of a simple U-channel FEA first in the FBF code and then to adjust the MMF results to be comparable by changing the friction coefficient. (The full bending code has been previously quantitatively correlated to many soft and hard tool stampings.)