The Cryo II and the original Cryo are made from the same steel (8Cr13MoV) and both are dipped in a Titanium Carbo-nitride solution to give it the nice looking finish. The only difference between the two knives is the blade length:
Cryo (original) blade length: 2.75in
Cryo II blade length: 3.25in
In my opinion, it would be better to get the original Cryo because it obeys just about all 50 USA state laws since it is under 3in. It is a pretty rare thing to have an EDC knife that is also concealed -carry and can be taken just about anywhere without worrying about it!
When looking at your local laws, remember the Cryo knives are NOT switchblades, they are considered "assisted open" knives that require you to put pressure on the blade to open them (instead of a button). They do not fall under the "automatic open" section of the law.
Thank you for informing people of the real facts. I would enjoy a drop of the longer blade version, but whatever everyone votes for, I will be happy with.