The species is distinguished from Eucladoceros ctenoides and Eucladoceros dicranios by a different antler bauplan: the antler crown in Rucervus radulescui is formed by up to three tines—which may be bifurcated—inserted on the posterior side of the distal portion of the beam. The antler crown in Eucladoceros is formed by three to five crown tines inserted on the anterior side of the antler beam. Unlike Eucladoceros, Rucervus radulescui does not possess the accessory prong situated somewhat medially in the area of the first ramification.
Rucervus radulescui is distinguished from Rucervus simplicidens/colberti from the Siwalik fauna by the relatively high position of the first ramification, the relatively shorter crown segment of antler (the part of antler beam that bears the crown tines), and the palmated distal portion of antler. The new species is distinguished from Rucervus ardei (Croizet & Jobert, 1828) from the Late Pliocene of Perrier-Etouaires (France) by the absence of small additional prong on the basal tine, somewhat divergent pedicles, and practically complete reduction of lingual cingulum in upper molars. Unlike both Arvernoceros ardei from and Rucervus simplicidens/colberti, the new species is characterized by the pronouncedly oval cross-section of the beam.
Rucervus radulescui is distinguished from Rucervus verestchagini (David, 1992) from the Early Pleistocene of Salcia (Moldova) by significantly smaller body size, simple cylinder-shaped first tine (not flattened and trifurcated as in Rucervus verestchagini), and the well-developed distal palmation.