could you really tell people apart?

next topic, I'll post it in this section..

1-2. Latinos

3-4. Indians

5-6. Pacific Islanders

2nd one has south Asian admixed and the last one has Melanesian admixed 

2nd one probably does have South Asian admixture since several Native American Indians have shown to have some percentage of South Asian DNA. She's a Latina however she maybe considered a Mestiza therefore her light skin and facial features is due to her Iberian ancestry and Native American Indian ancestry since several indigenous ancestors do have light skin also. 

6th pic could have some Melanesian but he's a Polynesian.