I doubt radar range played much of a role - the IAF is transitioning to AEW-controlled sorties so the drop in effective range, if less, wasn't a top priority. Also, isn't the current CAPTOR mechanical while the RBE2 a phased array?
Anyway, it has been proved that THIS is the reason the Rafale won:
Catherine Auriol | Dassault Aviation | Flickr - Photo Sharing!
