As far as I know a Chicago 'Ace' has various anti-pick refinements that make it secure for its vending, etc applications. If it were not for these refinements the product would be useless for this purpose.
So there seems to be a perception out there that any tubular lock is just as secure as the 'Ace'. Kryptonite would be better off using a 4 pin cylinder with a decent paracentric keyway and preferably with a few mushroom drivers. Even better a 5 pin cylinder and select differs with a fairly deep cut on one of the front pins and a shallow cut on one of the rear pins.