Webinar handouts/presentation are created by the presenter/speaker to moderate the session. It comprises pointers used by the speaker to moderate the session. It helps the attendees to grasp the session effectively.
On contrary, transcript is a PDF version of written material originally presented in the Webinar/audio-conference. It comprises word-to-word information presented by the speaker. It also includes the questions and answers asked by the participants in written format.
You no need to pay extra for the webinar handouts if you have registered for the session in any form (Live, DVD, Transcript and Digital Download). However, you need to pay the actual product price to get the transcript.