I don't think that you'll notice any difference in durability or that one particular type will pull the stud through the track. It all comes down to personal preference based on looks and price.
I've run both and haven't had any problems with either one.
I ran Woody's on my XLT with the nylon backers but I had some problems with the backers breaking in 1/2 after a season. Don't know maybe it was just mine. Running Woody's again with the large aluminum backers on my new sled. so far so good.
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