these are both Dmitri Sinkevich designs by Kershaw and ZT. I had the Kershaw for a little while, I just got the ZT
the Kershaw Atmos was around $30, the ZT 0452CF is $240 retail but I got it on ebay for $160 so I could not pass up that deal
similar blade designs, the Kershaw is 3" blade, the ZT is 4.1" blade. overall the ZT is about 2 inches longer OAL. Kershaw is 8Cr steel, the ZT is S35VN.
both are super snappy and smooth opening, riding on KVT bearings.
the ZT is really light with the CF handle. half the handle is CF the other half is Ti. the opening on both these are really, really nice!
this is my 6th ZT, and all of them are worth the money. great parts, opening is great on all of them, all of the steels are top notch.
you cannot go wrong with ZT!!!!!
and sometimes Kershaw is pretty good too.