I've used both. The Pro Auto Disk is worth the extra money easily. The Safety Prime also works well. With those two on the LCT you have a very good reloading press that will load about 3 boxes an hour of quality ammo.
Glad someone mentioned the Safety Prime. For such a flimsy looking piece of equipment I am shocked at how well (and safely) it works. Now that I am loading with both large and small pistol primers I am even more impressed with it. Changing primer type takes a matter of seconds. Swap out the safety prime unit, swap out the lever primer arm and you are good to go.