Is the same background check done on a person petitioning for us citizenship done for somebody applying for a I-90?

No, the background checks for U.S. citizenship applicants and those applying for Form I-90 (Application to Replace Permanent Resident Card) differ in scope and purpose. Citizenship applicants undergo a more extensive background check, including an evaluation of their moral character, criminal history, and adherence to U.S. laws, as part of the naturalization process. In contrast, the I-90 application primarily focuses on verifying the identity and Immigration status of the permanent resident seeking to replace their green card.