The red box Diesel Whiskey Row Founder's Collection Mizunara has a very similar opening. I thought I was crazy, but basically the binder and wrapper are closely related but flipped. The Diesel is Mata Fina over Broadleaf. The Ratzilla is Connecticut Habano over Mata Fina. Add in the healthy dose of Esteli Habano in the Diesel and the first few puffs are similar.
I was thinking, maybe my pallet is going or my lighting technique was making cigars taste too similar. But, it hit me on the third or fourth puff and I had to check. Now ten minutes in and they head in quite different directions.