I just looked at it, and I can give you a comparison to Pat's just from what I see.
I have Pat's, and like the way the implement pins click into it. On the one on Ebay, it looks as though there's more work to getting the pins in. With Pat's they just snap into place and there is a spring on it. Looks like you have to remove the pin on this before you can click in the implement.
I like the way the one on Ebay latches onto the hitch arm by going through the socket ball. That may be better than Pat's, but the one on Ebay doesn't LOOK all that well made compared to Pat's.
The hook looks much wider, and on some captured pin type implements, I wonder if it would fit in between the side pieces to capture the pin.
Not sure if you know what I mean by captured pin, but they're the ones that have a piece of metal on each side where you attach to the pin. The other types, non-captured just have the pin sticking out without a piece of metal on either side.
John