On the first page of the thread:

Originally Posted by tatfiend Thanks for the information. I take it that you do not favor any of the On Guard locks. Any particular reasons that you are willing to divulge?

The materials and machining on the 'on guard' locks are inferior to the 'kryptonite' brand. This equates to a lock that is easier to break via prying/jacking. The key systems are not as durable and secure.
Simply better quality.

I would recommend kryptonite over on guard any day of the week.