Obviously the more we discuss this, the more differences come to light. Now it even appears that companies like Speeco offer different QHs, even though they are the same category.
Our local Farm Supply store stocks Speeco. I checked out the CAT I QH. They are very well built and heavy. Nothing cheap about them at all. They come with a Top Link adapter and roll pin CAT I to CAT II bushings for the lowers. The lowers are CAT II.
So now I'm more confused than ever. AND,,, I still don't know who makes Speeco's QH or LP's for that matter???
I'm beginning to think everyone is importing them. The differences are simple contracted specification requests.
If ordering one, sight unseen, I'd want to know the lower hook size. I'd also want to know the weight of the product. Those two things will give you an idea of the durability that you are buying. Otherwise,,, who knows what you'll get.