ASQ/ANSI G1 vs ISO 1991:2015

Hi there. For a government element, curious what the pros/cons are of ASQ/ANSI G1 vs ISO 1991:2015 certification. Since ISO 1991:2015 certification has an associated cost, it is my understanding that ASQ/ANSI G1 is self-certified….so there is not an associated cost per se. Therefore, it seems like for organizations with funding issues, ASQ/ANSI G1 might be the better way to go. Would like to pitch one or the other to my workplace…but before I do, would like to understand the above. Thanks for any advice or insight!