As an engineer who works at a company with in house manufacturing, those in my industry have a slightly different definition of quality. Quality is defined as the reduction of variability and the adherence to drawing requirements. It's something can be observed, measured, and quantified. (It's not the "it makes you feel good" ******** people always talk about)
I've noticed a decent amount of variability in the products I've received from SK. Some likely reasons would be:
- The SK drawing is toleranced such that it allows for the variance, and that's why it passes through QC. At this point, it's not a QC problem, it's an engineering problem.
- Their processes are no longer in control and their QC dept. needs to adjust their inspection sample sizes. I've seen this happen twice; a very experienced machinist gets promoted to a position their not qualified for, like a plant manager. The individual lacks the education and training to know how to implement statistics into a process.
- The corporate culture is such that employees are pressured to pass junk to meet timelines.
That being said, my experience with Snap On has been consistent. Every ratchet I receive just seems to be identical to the next. From my sample size, their products don't seem to have much variability and the product just always seems to be flawless.
So if you want to get into the niddy griddy of it, yes. There is a distinct difference. SK has a wide range of variance, resulting in poor quality. SO has been consistently awesome.