Not praising or condemning any if the available hitches. Many times, as posts are written, the writer bases the strength of the hitch on the tow bar portion and negates discussing how the ball mounting structure is designed.
I beleive a few years ago, Doc Humphries had a hitch failure come into his shop. Granted it may have been on account of the hitch mounted basket, or simply from pulling a trailer. I do not recall.
The point being, the hitch ball itself is loaded in such a way, that it sees constant loads in a front to rear / rear to front stress or loadpath. The hitch ball has a short but measurable height above the mounting plate. This height acts as a lever. The loaded trailer, induces for es into the ball and because of the balls height, can flex the metal mounting plate. Over time fatigue will happen if the design is not adequate for the loads.
When I see hitches with an angle steel type ball mount plate, and no gussets to spread loads and minimize the bending flex, My experience as an aircraft structures guy makes me wonder why. Possibly the design is overbuilt and does not need the gussets, or possibly, the design seemed good and went into production with no testing until failure.
We have a BRP hitch. Is it stronger than aftermarket, is the design adequate for long life? I do not have those answers. My one basis reverts to Joe and Ann of Squared Away, dragging that loaded trailer to all parts of the USA. Possibly they have had hitch replacements, but never recall them having a hitch failure. Pretty certain they have the BRP hitch assembly, but am willing to be corrected if wrong.