The theoretical analysis based on three Markovian stochastic models provides a closed-form solution for the difference-frequency Rayleigh-enhanced polarization beats. The subtle Markovian field correlation effects have been investigated. The different roles of the amplitude fluctuations and the phase fluctuations have been pointed out both in time-and frequency-domains. The difference-frequency REPB signal shows symmetric temporal behavior,and differences among three Markovian stochastic fields are quite sensitive to the change of bandwidth,and as the bandwidth increases,the difference becomes obscure.