EU ratings are 95/98, which are equivalent to US ratings of 91/93.
So, EU 95 octane = US 91 octane and EU 98 octane = US 93 octane
There is a slightly different octane rating so it is not a 1:1 relationship. But I think that EU does have a slightly higher base octane rating than the 87 swill we find on most of our pumps.