There are regional differences to what is considered an issue with age differences. A man marrying a woman thirty years his junior in the Philippines is culturally acceptable in the woman's culture. A man from Morocco, who has never been married before, and in his twenties, marrying a divorced woman with children who is too old to HAVE children is extremely unusual. So no, age differences are not "looked at the same". In the context of US Immigration matters, very consideration takes totality of circumstances including local customs and accepted behavior into account. This discussion and my assertions are all in that specific context. All that said, in this case, the age difference is probably not an issue.