In fact, there is no difference because the Persians are the Iranians. Persians are the largest (and indigenous) ethnic group that inhabits Iran. The thing is that at the beginning of the twentieth century, the name Iran became more popular than Persia. Wherever you meet the mention of beautiful Persian women, you can understand this as a synonym for Iranian girls. Therefore, nothing changes - the rules for dating a Persian woman remain the same. In addition, all that is true for the character of Iranians is also true for the character of a hot Persian girl.