I have used the rear hitch bale spear that has the one long spear, and the 2 short ones below it, for a very long time. Works just fine. I actually have two of them, one has a much larger diameter spear than the other, and that's the one I use. I also have a bale spear on my frontend loader, and it's the one long spear type as well. I've used them for a good many years, and have never had a problem. Never used one of the other kind you mentioned, so can't help you there.
