I have both the TnF cocktail and the AF. 'IF' I had to choose a keeper, it would be the TnF because you can play/practice/train by yourself vs CPU. With AF, you HAVE to have two players. My kids aren't tough enough yet!
I actually have another AF cab that I plan to make into a custom Missile Command cocktail. The original upright used the large trackball but the factory cocktail used the smaller trackballs. So, my MC cocktail will be better!