Yes, he will get more back. However, different rules apply to your son than they do to you. Your son will qualify as a dependent, as long as he meets all the requirements of a qualifying child. These requirements are listed at the IRS website below.
https://www.irs.gov/credits-deductions/individuals/earned-income-tax-credit/qualifying-child-rules
Since you're an unrelated adult, you will qualify as a dependent as long as you meet all the requirements of a qualifying relative. These requirements are listed at the IRS website below.
https://apps.irs.gov/app/vita/content/globalmedia/table_2_dependency_exemption_relative_4012.pdf
