Can some one please help me understand the diffrence between the Out of the box Eistein Lead scoring ( which we set up by setup -> Assisted setup) and Prediction builder.

I have set up both scoring in my Org, but when I compare these two, there is a huge diffrence in the score. Like, the score I'm getting from the Out of the box Eistein score  is 80, and score I'm getting from Prediction builder is 15. Why there is a difference ? How to decide which one is the correct score ?