Earthborn
Terrestrial Intelligence
I think the analogy holds up pretty well. Whether you are talking about different nations, or apples and lettuce you will first have to answer the question: "Superior in what?". What aspect do you think the superiority needs to be measured in?If you are going to make a false analogy, at least have it make sense. Between an apple and a head of lettuce, one of them will be superior, either in taste or nutritional content. Care to address the question instead of playing these games?
I am sure you can show that some cultures are superior to others in some aspects, others will be superior in other aspects. Some may be superior in many aspects, while others lag behind in many aspects.
However without stating explicitly what aspects you are interested in, the question whether one is superior to the other becomes meaningless; there wouldn't even be a metric to determine whether the things to be compared are "on the same level".