I would say get the original one. I did a quick google and cant find any definitive description of the actual improvements, but I am guessing that its just a little thicker, or they wove it differently or something.
You dont need the 3x stronger one, but since the price is cheap you "could" test it out and get back to us with a side by side comparison of physical description and use.
Otherwise just stick with what we know works. Also, don't burn the copper to clean it like many people are doing. If you read through the faq on the chore boy website you will see that all they use is mineral oil. That can be cleaned off with a solvent like acetone. Just soak it in acetone for 30 minutes, then set out to evap off the acetone.
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