I have the older style and it is great when worn next to the skin or over a thin base layer. It fits well and snugly and feels soft and dry next to the skin.
The newer ones feel slimy next to the skin, seem baggier and are no longer advertised as suitable for wearing next to the skin. It seems to be more of a jacket rather than a “put it on and forget about it” garment that the old one was. I sold my newer one after 2 rides in disgust at it’s performance on every level compared to the old one. The new one is just another jacket.
This is a shame as the original is the single best item of clothing I have come across for riding in our climate. I’ve resorted to repairing my old one and hate to think what I’ll have to do when it finally dies.
I guess this happened as people couldn’t shake off their layering mentality so Gore didn’t sell many. The same issue has happened with the softshell concept as piloted by Montane, Patagonia and Buffalo and what is being marketed as softshell (i.e layering with non-waterproof breathable garments) in the climbing world. I much prefer to get dressed and just ride rather than stopping all the time to change, which was the originals strength. Barring hammering rain you only needed the one top for 9 months of the year!
Mild rant over (although Gore, if you are listening…..). Hopefully you get the point about the differences.