I have the plus back panniers and the plus ultimate5 (non-compact) handlebar bag. The material is a little lighter than the classic PVC one, which makes a difference for the panniers, but probably not really for such a small item. The full size handlebar bag also comes with two side pockets, unlike the classic version, but I don't think that's the case with the compact one. I haven't looked into prices, but "PVC-free" might well be the main selling point here.