Having proposed a new method for population balance modeling of equilibrium copolymerization, rectified the available copolymer equations presented in the literature, and with stochastic simulation scripts in hand, we set out to compare the precision of these three methods given the same input parameters. Because the results of these methods can be sensitive to user-defined parameters (e.g., number of macromolecule chains simulated, integration time-step size, and number of equations to track) an initial optimization was performed to identify suitable conditions for all models to ensure accuracy across a sub-set of input parameters (see the Method Comparison Details Section of the Supporting Information). In line with widely used methods to characterize irreversible copolymerization, for our method comparison we considered a system with fast initiation relative to propagation, no termination or chain transfer, and a targeted degree of polymerization of 1,000. A representative plot of copolymerization data after this initial optimization is shown in Figure , which suggests excellent agreement between the three methods. For all cases presented herein, agreement in comonomer consumption predictions as shown in Figure is accompanied by agreement in predicted rates of reactions (Figure ).