Do parents and grandparents know when a child (their own) isn't very attractive?

I'll share a real case of fraternal twins; they are my friend's aunt's children:

Let's call them John and Eric. Both are now 22 year-olds. John was born very cute even as a newborn; not too wrinkled and a macrosomic baby weighing 10 Ibs. He had a symmetrical face, milky skin tone and two recessive genes; red hair and green eyes. He was like a European doll. He got confused for a doll at a supermarket a couple times. As a child, teen and then adult, he's still attractive. He grew up to be 6'3.

His twin brother Eric was born wrinkled and had typical Andean features such as medium olive-brown skin, straight black hair, dark eyes and weighing like 6.60 Ibs. Unlike his brother, he was never confused for a doll and wouldn't get praised as much by strangers. He grew up average looking and 5'10.

Both the parents and grandparents would claim both were equally beautiful. Whenever people only praised John for being cute, they would say Eric is cute too. Though deep inside do you think they know when a child is really exceptionally pretty vs when they're just average in looks? I know many will never admit it but do you think they know that?

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11 mo
Are they consumed by their deep love that they can't distinguish the difference between a truly gorgeous baby (to the point he's confused for a doll) and an average baby. Or do they really notice it and will never say it?
Do parents and grandparents know when a child (their own) isn't very attractive?
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