Not a direct comparison though. The octane rating method for Europe isn't the same we use in the US and Canada. We use AKI (anti knock index) method of R+M/2 while most of the rest use the RON (Research Octane Number) standard (that's the "R" in R+M). A 95 on the European RON scale is about the same as 91 on the North American AKI standard.
I always run Shell V-Power in my bike - 98 Octane - when I can get it. Never thought it would make a real difference, but it does. Was on a hire Ultra in Australia for a couple of weeks, with temps over 100 degrees, and the bike sounded and ran like a bag of wrenches. V-Power in it (it goes beyond just the octane rating, other 98 Octane brands don't do it) and the transition to a smooth, nice sounding motor was incredible.
In Germany - never seen it elsewhere I don't think, though I may be mistaken - some filling stations have V-Power Racing - 100 Octane. Wish we could get that here!
Jim