The Su15 original model was in service and would have been potentially a much more capable interceptor than the stripped down MiG21PF the Vietnamese got. They would still get the same MiGs as in OTL, but a small number of Su15 would be deployed to intercept the B52s. Since the PVO was looking for an improved model at the time, that emerged as the Su15TM, and developing the MiG25P, security issues should be manageable.
At the risk of this turning into another red vs blue debate, how would the Su15 fare?
At the risk of this turning into another red vs blue debate, how would the Su15 fare?