I've got a parkerized and the military regulator and I believe the only reason they have minor thickness differences (.020) is because of the coating adding the extra thickness on the military reg. The underlying steel is made from the same stock thickness of 5/16". Parked is definitely lighter like you say!
But yeah, the parked one is quite different with that deep hollow grind which is why I love it so much, because it's so thin at the tip and edge. Waaay thinner than the mil reg so it'll cut and penetrate way better. No doubt the mil reg is more robust though being so thick behind the edge. But unless you're breaching concrete walls, I'd imagine either is up to all kinds of insane abuse.
Are you saying this urban reg tip is thinner than a parked reg? I find that hard to imagine unless you're saying it's a factor of how it's obviously sharpened as then you can make it as thin as you want.
Either way, this thing looks great! I'd love get an all gray one like that. Looks awesome!
Military Reg on left, Parkerized Reg on right, stock edges :
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