In option 2, even if it's two different servers, you can point one to server1.com and the other to server1.com/api which solves the same CORS problem you mentionned in option 1, doesn't it?
You can have a subdomain pointing to different server but you can't have same domain for different servers.
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In option 2, even if it's two different servers, you can point one to server1.com and the other to server1.com/api which solves the same CORS problem you mentionned in option 1, doesn't it?
You can have a subdomain pointing to different server but you can't have same domain for different servers.