MC tends to be more physically accurate (in the limit of a large number of particle histories) because it can simulate radiation transport in continuous space,

MC tends to be more physically accurate (in the limit of a large number of particle histories) because it can simulate radiation transport in continuous space, energy, and angular distribution. Deterministic methods can be faster, but the discretization process is somewhat of a dark art because the underlying distributions can be highly nonlinear and rapidly varying. A combination of methods with varying levels of fidelity are typically used in real nuclear engineering applications, and are always referenced back to a common suite of experimental benchmarks for validation.