Jack Plasimus has all the powers Vlad Plasimus has and the experience as well.
This episode proves that even if Vlad was never hit with the prototype ghost portal and got ecto-acne Maddie still would have chosen Jack, so Vlad really has no reason to hate Jack.
Since Danny changed time by pushing Vlad out of the way of the prototype ghost portal Jack was the one who gained ghost powers. Vlad pushed Maddie out of the way she fell in love with him and married him.
Clockwork's aging was mixed up. ts suposed to be [baby, middle aged, old, baby middle aged, baby] in this ep it was [baby, old, middlaged, baby, old, middleaged]
Vlad's hair is still white even though he was never hit with the proto portal. Jack's hair remains black even after he was hit with the portal.