I had ties to both Zee and Zed-speakers growing up, but in my experience, Zee and Zed can be used somewhat interchangeably, even across the pond. This might be in order to account for names (like Z Z Top and Jay Z), puns (such as La-Z for lazy) or even ease of pronounciation - when playing CSGO, I’ve heard Americans refer to the CZ-75 as Cee-Zed-Seventy-Five, because they found it weird to switch between the cee, zee and seven sounds, but I’m not sure how common this is.
I had ties to both Zee and Zed-speakers growing up, but in my experience, Zee and Zed can be used somewhat interchangeably, even across the pond. This might be in order to account for names (like Z Z Top and Jay Z), puns (such as La-Z for lazy) or even ease of pronounciation - when playing CSGO, I’ve heard Americans refer to the CZ-75 as Cee-Zed-Seventy-Five, because they found it weird to switch between the cee, zee and seven sounds, but I’m not sure how common this is.
CeeZee SeventyFive is easy to say, it even rhymes at the starting bit
a lot of people do say Jay Zed, but knowingly tounge in cheek in my experience