Three series of ethylene-propylene copolymers are made using the catalysts (1) rac-[Me-2-Si(2-Me-4-(1-Naph)Ind)(2)]ZrCl2/MAO, (2) [Me2Si(Ind)(Flu)]ZrCl2/MAO, and (3) a 1:5 mixture of 1 and 2, all with a broad range of (co)monomer mole fractions in the reactor and copolymers. All three series are analyzed by C-13 NMR, DSC, and SEC. The C-13 NMR spectra of the single-site series are the input of the direct peak method to determine the second-order Markov reactivity ratios of the catalysts used. The activities and reactivity ratios of the catalysts in the single-site experiments are used to model the dual-site series based on C-13 NMR data. The results of this modeling are used to interpretate the DSC and SEC data of the dual-site series: most of the melting peak temperatures and molar masses of the dual-site can be attributed to one of the two catalysts.