Yes, KT can kill a KT, but not at extended ranges. Tiger can only penetrate the lower nose, and only out to about 1000yds.
Currently, we have only one, count it, one cheap tank capable of engaging the KT from the front (T-34/85). And thats because of HVAP.
Not asking for half the racks to be stocked with APCR, just a few round, maybe 4, per tank.