  The kinematical features of the differential cross section distributions in
inclusive W boson production at the Tevatron (ppbar -> W X -> e \u{psion}_e X)
are presented using the resummation program ResBos, and the Monte Carlo event
generator Pythia, and are found to be in marginal agreement with each other.
While both programs reproduce the basic qualitative features of W boson, the
distributions validate that Pythia can't be used as a reliable substitute for
ResBos as far as the invariant mass of W boson and other electroweak precision
measurements are concerned.
