Just trying to help here
I was not able to find the cr1 EU label when you 1st mentionned it, only found the malaysian labels that I shared, which do not point toward best fuel efficiency. However, as you said, there may be a new iteration of this tire with better performance ?
It seems that CR1 is not sold in Europe
"how it ranks against other brands?"
"done that as well"
Could you share the sources of the comparison?