I think your looking at car part brands the wrong way.

Kraft foods is both a brand and producer. Shop Rite is just a brand reselling Kraft. Sometimes the producer makes a product tailored to the buyers needs, or more importantly price goals. More often, its actually cheaper to keep a production line running longer than to retool, hence the key food cheese ends up being the exact same product as the more recognized brand.

Beck arnley is indeed a reputable brand as they TEND to source from quality producers. I received flenor (made in Germany) ball joints from them, costing less than ones advertised as flenor on the box. I also bought timing chain components to find parts made by the oem for mitsu. I even once ordered two of something (forget what) from Beck and found two different products make to two different specs in the boxes. One being Japanese and one Chinese.

Even worst is when you have brands like AC Delco and Motorcraft. You think your going to the dealer to get Oem but its just more outsourced parts. Unless it says GMC oem, its not, and even then who knows if they stopped making their own or switched oem at some point. (One dude on here wanted gen2 uca and was considering AC Delco. Based on the picture it was the exact same product as the ones on ebay for a third of the price. Guy didn't want to hear it)


tl,dr; If you were satisfied with the tensioner the car came with, find out who the one was and buy it. If you can't or don't have the time, Just buy it from the dealer. If you weren't happy with oem, find out if anyone produces an improved or updated design and buy that.