Ok I'll bite,
If you take your version of how easily it is to make up the exact same type shape and profile of either they will do about the same things. That said though, in order to get the same velocity from the jacketed as you do from the lead bullet, your going to have increased pressure, which also results in more recoil and muzzle blast. To some this is not an issue to others it is a deal breaker. After that you DO get copper fouling with each and every shot fired using copper jacketed bullet, there is simply no way around it. There are ways to minimize it, with coatings, but you will still get fouling.
With lead you also get fouling, the difference is it is softer and when the fit is proper for the bore it is going down the next bullet usually will strip the first bit away resulting in less actual build up. However if the fit is not proper for the bore then you bet you can foul up a bore really quick.
Now in order to get a true Keith or WFN type jacketed bullet, your will have to have special dies and draw, and press the jackets carefully to avoid ruining them. These extra steps also impart work hardening to the copper used which would have to first be annealed in order to keep it from getting brittle. It might even have to be done more than once, depending on the operations involved to get them into the final shape. Each extra step adds cost which is passed on to the purchaser.
You mention in your example that the jacketed cost equal to or possibly even cheaper than the cast do. That is in one configuration only, not in the hundreds of different configurations in which cast can be had. With the jacketed you get what is mass produced, and the only reason they can compete with cast is that they sell tens of thousands more of one specific type. They have the tooling set up, and when they make a run of them it is in the lines of 50K or more at a time. When they pour up cast they do them in runs of 2-3K at a time, so mass produced verses more or less custom made will always be cheaper. Why some cost more is the advertising, and extra testing they had to do in order to get X brand and type of jacketed bullet to preform as it was designed. With cast, you get the same performance time and time again when using the tried and tested age old alloys.
As for the hardness of the jacketed verses cast, yep your correct, the jacketed are harder, and they are harder on your barrel, and it is harder to get out once it is deposited in the bore. As for smoke, yep some combinations of lube smoke worse than others, and some smoke with some powders worse than they do with other powders, but I'm like some of the others, I have a closet full of jacketed that are being less and less looked upon as I gradually work up loads for my cast. If I had started out handloading with cast bullets 40 something years ago, I probably would never have used a jacketed bullet in anything.
