In reply to Frank R.: Well Gore have always sold the material in different weights, dernier, and other material differences so why should pro be very different ? As long as people label what it is.
Anyway, to clarify. I have a v. old 3 ply goretex jacket, a 10 year old paclite and a 3 (?) year old pro jacket that has a few hundred days on it. It was a lot of cash, but I am very happy with it. I use it for moderatley active stuff (climbing, mountaineering) and low activity stuff (fieldwork, easy walks) and it works well enough for both. Breathability is fine. If I'm going running I use something else.
Whether you get pro or not depends on what you do, expect to do and so on. The new , 'cleaner' Gore materials are appealing, but I won't need a jacket for a long time I think, and the existing jacket is already made and someone is going to buy it.
How often are you going to be using this? If it's every other weekend maybe, and only in the winter, then perhaps get the non pro jacket. If it's a lot, then maybe the pro.