I am creating a subdomain with a different account (same name-servers)
But I am wondering if there are any advantages to giving the subdomain a dedicated ip (same server hosting)
I am creating a subdomain with a different account (same name-servers)
But I am wondering if there are any advantages to giving the subdomain a dedicated ip (same server hosting)
It makes it possible to have services available only on the sub-domain or only on the domain, or to have different behavior depending on the IP address.
As noted in the comments, you can have different SSL certificates. But given that the both belong to the same domain hierarchy, a single certificate with an alias would work just as well.
Network overhead will be minimal. However, originating traffic from both IP addresses is not a trivial task. By default all outgoing connections will originate from one IP address.
I generally limit use of extra IP addresses to test environments where each IP address can have different software listing on a port. In a small production environment, it might be appropriate to have a publicly facing test server on a second IP address. Other than that I haven't encountered a good use case for a second public IP address.