Quoted:
Moog is better than AC Delco...why??
I can't speak for anyone else, but Ford and GM have a couple of different parts lines, similar to most chain parts stores honestly.
When talking front end parts, the "lower end," AC Delco and Motorcraft, they're typically made in the same Chinese shithole as mass produced chain store house brand parts. If I remember right, for example, when I was at the dealer the Motorcraft branded part was not really approved for use in performing warranty repairs. That oughta tell you something. AC Delco and Motorcraft branded suspension and brake parts were designed to compete with the chain store parts, offering a decent part at a similar price that came in nice packaging that lead you to believe you were buying factory parts, which you were, kinda, but you weren't.
Motorcraft brake pads for example have base part numbers like 2V200 or 2V001 (I think). The "V" stands for "value," and these brake pads come in pretty red, gray and white boxes that look suspiciously like the boxes chain store brake pads come in, and they usually don't have the backing shims and clips and whatnot with them. Real deal OEM Ford brake pads come in plain jane brown cardboard boxes, usually with all the shims and anti rattle hardware, and they omit the "V" in the base part number. Circa early 2000s, I remember the Motorcraft pads listed at like $38.95 a set, while the same Ford brake pads started at about $80 a set. There's a reason for that.
Now, don't get me wrong, AC Delco and Motorcraft branded parts are good shit for certain applications. Electrical stuff, good to go, just not the greatest for front end and brakes, IMO.