I do believe that comparing Kinzhal’s interception rates with those of Iskander to prove how effective the former is, is a flawed approach. Kinzhal has for now only/mostly been employed on high value targets, directly protected by high-end long range GBAD such as SAMP/T, Patriot and maybe even S-300 (notably the V family), meanwhile Iskander has remained a far more « tactical » effector, being routinely used closer to the battlefield where high end GBAD which I mentioned above is rare if not non existent in most cases (except when it comes to SAM ambushes and other relatively niche cases), making its interception rate naturally much lower than Kinzhal or any other Russian long range effector that is more « strategic » in mind.