Ok got the new one today, and here is some comparison..
Keep in mind I've only used the "used" one on 3 hunts, no more than 2 hours, not in gravel, and only pried on little (pencil sized) roots.
As you can see on the new one, the steel is much shiner than the old, and no, mine was not that shiny when I got it.
Also the steel has interacted with the soil and leeched onto the blade. It is NOT rust, as I removed all dirt and dried thoroughly when I got done.
I took a small ball peen hammer and tapped on the back of each one, the new one sounds higher pitched, when is usually a good indication of stronger temper.
I've ordered both knives from two "big names" in Metal Detecting on eBay, both with high excellent feedback, so I have no doubts of either one being a "Replica".
Conclusion:
After hunting with ONE lesche over a span of 3 years, digging through old gravel road, prying on heavy tree roots, etc, I NEVER bent even the tiniest tip of the blade. After using this one 3 times and bending the tip pretty good on a very small root, I have come to the conclusion that this one either came from a bad batch of steel, or was not correctly tempered. Since there was an unusual interaction of my soil with the lesche itself, (never did that with my old one, even leaving soil caked on it in the rain for a month) my ultimate conclusion that it was constructed from a bad batch of steel..
I would hope, or at least assume, that the manufacture would perform some load/shear test on the blades of these on every main batch of steel to make sure they pass the stress they are exposed to in the field, but obviously that isn't the case..