Performance vs Performance+

What is the difference between Performance and Performance+ in the Model S? And in your opinion, is it worth it?

also, what is the price difference between the two? I assume the biggest jump in cost is buying a P85 over a standard 85.

I'm getting the Model X, which I assume will also have the same option choices. We are nowhere near the ordering stage, but trying my best to prepare and get a feel on how much the extra options are going to pile up!

Thanks for the replies. I didn't realize you can price out everything on the S so easily without giving out any information, etc. I have been obsessing over the X, and haven't spent much time going through the S. When I test drove the S, it was a P85+ loaded to the gills. It was great, but the sticker was about 124k!