Nonuniform radical pair recombination reactions originating from energetic inhomogeneity can be revealed by comparing the kinetics monitored in transient absorption and in delayed emission. The dynamics of the high-energy tail of a distribution (weighted by the Boltzmann factor for repopulation of the emitting state) determines the kinetics observed in emission, while in absorption the bulk average is reflected. In reaction centers of Rb. sphaeroides we found the recombination dynamics of the radical pair P+H(A) to be faster and their magnetic field dependence to exhibit a significantly broader resonance line width when detecting in emission than when monitoring in absorption. This points to larger values of both the singlet and triplet recombination rates for the high-lying radical pair states. The observed increase of both rates with increasing energy can be understood only if superexchange coupling via P+B(A)- is prevailing for these recombination reactions, since its energy denominator decreases for the high-lying states. The observed weak temperature dependence of the average amplitude of the delayed fluorescence as compared to the amplitude of the prompt emission can be modelled by averaging over a Gaussian distribution of the free-energy differences with a maximum at DELTAG0 = 0.25 eV and a width of 2sigma congruent-to 0.1 eV. The deviations from monoexponential kinetics of primary charge separation and the weak electric field effects on the fluorescence are attributed to this energetic inhomogeneity.