All KZ IEM releases? Are you SURE you have enough space on your drive for a list that big?
If you can't figure out how old a KZ IEM is look at the orders on the KZ official site
If it's zero, then congratulations, you are the first one to spot it. Buy it fast so everyone else can point and yell "Sucker!"
If the number is large 100+ then you have either found an older model or a hype train. Without reviews, then definitely a hype train!
If it's between 1 - 100 and has reviews, then it's an older model that has numerous siblings indistinguishable except for the faceplate.
If you find one with a negative number of orders, turn off your computer and run. PLACID (Peoples Liberation Army Cyber Intelligence Division) are really pissed off at you for hacking into AliExpress to steal their secrets. It hasn't been released yet!
Otherwise just look at the KZ Franchised store who have probably jumped the gun AGAIN and released another IEM before the launch date.