The turbo plug has a better sealing and falls in a perfect shape with the combustion room giving the best compression without distortion of the flow of the mixture. If it does something compared with standard plugs is maybe hard to tell, the change to give it a try can alway give a different compression due the shape and tolerances of the new button head.
I know my 1st TOP engine with (by then) the new turbo plug did give me a lot of problems so I did use a button head of an old engine and normal plugs and did not notice anything but only a better life of the plugs (back in 1994). Today there is no one with an high end top engine even wanting to try a standard plug....
Turbo plugs are patented, that will make a difference in price. Also the shape between brands is not universal to go arround the patent so there is a less choice of plugs compared with the standard plugs which do have more choice in temp range but also more brands making them.