I don't like incompatible parts. Perhaps the only difference in performance is that they were made in different factories. I don't know, but one of the two didn't have the dust cover that the other had. Both are stamped MOOG part number 515054 and generally fit the same. But the clips on the ABS cable are also different. I've searched online and found that there are actually different parts with the same part number depending on where you buy them from. I'll end up sending the one back without the dust cover and will find and order one with a dust cover. In terms of performance after installation, based on other reviews I reckon they will be great.
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