I asked an adjacent question and am also curious, great that they have provided another option for the OpenJDK community but I can’t see anything compelling that would make me consider this over Adopt.
If you are already paying AWS for premium support, one reason to use Corretto rather than Adoptium is that your AWS premium support plan covers Corretto as well.
"If you already have an AWS Support Plan, Corretto is covered on the same basis as all other supported AWS Services and software." https://aws.amazon.com/corretto/faqs/
