Tires from manufacturer to manufacturer can't be compared in size or tread wear. The only thing that is consistent is diameter.
You need to compare measured circumferences.
That said, I think you have something else going on, and your observation is spurious.
Very possible your Mich tires had a defect as well. It happens.
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2010 E82 1 Series M Clone
Hydra Performance augmented OEM+
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