Kreta Reserve Extra Virgin Olive Oil is made only from Koroneiki olives grown by small family farmers in the mountains on the island of Crete. An oil from one location, one olive, one processor, and one packer is always better than a blended oil because each step of the process to bring the oil to the customer can be monitored and controlled.
When you see a label that says the oil is blended from oils from various countries (Turkey, Morocco, Tunisia, Syria, Spain, Greece, etc.), the broker made the oil from whatever oil can be found on the international market. The broker may or may not care about how the olives were grown—about cleanliness in harvesting and processing—about the sanitary condition of trucks and boats used to transport the oil, etc, etc. Some of the countries that provide oil to brokers have less than desirable food safety standards or no standards at all.