Well... lets just say thatin the past I bought some "Wico" joys that Paige linked from EBAY and ended up with cheap junky knock-offs. They were the metal angle style in the pics.
I have a pile of wicos and a pile of these metal bracket ones, and all of the metal bracket ones I have are not wicos. I actaully wasn't pointing my comments at Paige, as there is no-one on Earth that appears to know more about Arcade stuff than him. It was more of a general bit of info.
My personal recommendation would be to avoid the metal angle style, as many (most?) of them are probably NOT wicos.