What is the advantage of "high security" handcuffs chain link on the hinges?

I ask this because I see both on sale. The high security require special key, but use the link in the chain, while the hinges are rigid, but uses a universal key. The high security is also more expensive to hinge. I always thought that the hinges were the safest.

Hinge is safer because it is more difficult to cut. They also hold hands to converge. I sincerely doubt that anyone is holding a universal key on them in case they get arrested ...

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