Normally in a civil case a judge would decide according to which side is more likely to be right, even if it is just a tiny bit more likely (and he can't refuse the decision, if both sides are exactly equally likely to be right).
Even tough this statement is arbitrary it's not a civil case to begin with.
And the two years warrantee does count for European countries listen within the European Union. At least any consumer can use the italian verdict as a valid argument. In Holland the same ruling counts.