Based on my understanding, the servers are running on vms inside a data center that Sev / SSG keeps on site. The data center is responsible for both LOTRO and DDO and that LOTRO itself takes up the brunt of the hardware resources. DDO supposedly gets less of the resources (smaller vms and maybe even due to load balancing bias). If all of the above is the case, it isn't a surprise that the DDO servers are better off small.