I agree that a jig is a jig and I never understood why a jig made just for swimming would be better than any other jig until I tried one. Hook orientation is one aspect that really makes a jig good for swimming, most swim jigs have a hook that uses a 30 degree bend, this allows the jig to come through cover and open water with the hook riding level or slightly up, regular jigs end up with the hook riding slightly down from level. The hook angle also make for good hook sets as the bait is moving, this isn't a noticeable thing to most casual anglers, myself included, but was told to me as it was how designated swim jigs came to be. The other thing I really noticed is when coming through weeds and brush, most jigs will list to one side a little bit, swim jigs are very good for running true, and since I started using them I have really come to see how the design elements all work together to make it perform best while the bait is moving. Skirts also tend to be shorter and thinner than other jigs but you can easily fix that part with a pair of scissors so it isn't a big deal. There are a few different kind of swim jigs, you have the California swim jig which range from 1/4oz to 3/4oz and even 10z models are now showing up, then you have your Coosa River swim jig, which ranges in the 1/4oz to 1/2oz range and has a thinner skirt and shorter hook than the California but it is still a stout design, and then there is the Northern style swim jig, these are normally in the 1/4oz to 3/8oz range and feature a thin skirt like the Coosa River style but these use a lighter wire hook than the other two. I use the California style in 1/2oz size for heavy cover with larger swim bait trailers, like 5" models, this is mostly for dirty water with moderate to heavy cover. I also use the Northern style, this is my all around swim jig as I use it for moderate or sparse grass, light brush and boat docks, this is also a good one to use with a 3.8 Keitech swing impact or 4" easy shiner or really any swim bait that is 3.5" to 4", I prefer the River Rock Bait Striker which is similar to the easy shiner and Gene Larew Sweet Swimmer. Choose the swim jig based on the cover you are going to fish and match the trailer to it, Strike King Menace grubs and Rage Craws also make great trailers so try that too and match the color to the forage, it is that simple.