I think you don't understand how mortality rates are calculated. This also explains why you took two completely unrelated measure and compared them to each other in your original post. Deaths per 100,000 is based on total population.

The SARS mortality rate for China in 2003 was ~0.02 (349 deaths, 1.3billion population). I was being nice to you and using just the population of southern china where the sars outbreak primarily occurred.

Whether that's the most appropriate measure for this comparison isn't clear, which is why included the other measures.