Oh, I thought you figured it out from the fact that it’s unlikely that the same person is a Rosh Yeshiva in both Tzfas and Monsey and was a talmid of both the Chazon Ish, zatsal and Rav Aharon Kotler, zatsal.
Thanks for your honesty. I was feeling a bit dumb for not having figured that out – although it is pretty unusual for there to be two people who have the same 3 names and to both be chashuve Roshei Yeshivas.