Comparing The Cause and Spread

The Bubonic Plague is caused by bacterium, while Ebola caused by viruses. The Bubonic plague is more mobile than the Ebola virus. This is because the disease is carried by rats and can be transmitted by fleas. Ebola does not have a vector; it is spread by projected body fluids from an infected person. The plague can also be airborne, in which the bacteria can affect the lungs. The Ebola virus is not airborne.

Sources

http://www.quora.com/What-are-the-similarities-and-differences-between-the-Ebola-epidemic-taking-place-now-and-the-Black-Death-pandemic-in-the-14th-century