Are the ages supposed to be very similar in these photos?
The larger teeth on the R could be permanent teeth coming in; but the shape of the smile is completely different, hairline appears to be very different, upper lip on R is much thinner than upper lip on L. Ear on R appears to have more of a sticking out lobe. Eyebrows on L appear to slant outward/downward more than on R.
Hard to answer when we don't know for certain when the photographs were taken. The one on the left is supposedly from Indonesia, taken when Maya was a baby. She was born in 1970 or 1971, (she has two birth years, depending on what article you read) the other, on the right, was supplied by Scott Inuoe, who claims the image is from 1969 in Hawaii.
I got it! They must be twins born two years apart...LOL!
Does that suggest the child with the perfect teeth is the older of the two? I don't know, this has given me a huge headache!
I can't even tell which one has been photoshopped, can you?