You must eat Iran's pistachio to compare with other sources, physical similarities and appearance of other origins do not reflect the taste of real Persian pistachio.
There are varieties of Pistachio in Iran. Each variety has its own differing properties and flavor such as;
"Fandoghi" (40% of pistachio orchards),
Iranian pistachios offer various advantages that set them apart from competitors. The following list details the three major advantages of Iranian pistachios:
Higher Kernel to In-Shell Ratio Iranian pistachios have a high kernel to in-shell ratio, meaning you are buying a higher amount of the edible kernels for the same amount of pistachios you buy.
Roast- ability Due to their higher unsaturated oil content, Iranian pistachios have the capacity to be roasted at between 160 to 180°C (hot air stream temperature). Good roasting brings out the unique flavor of the nut, while eliminating any live bacteria from the roasted product.
Taste Over a long period, consumers around the world have shown a preference for the taste of Iranian pistachios. All four commercial varieties of Iranian pistachios each have a rich, unique and distinctive flavor