What is the difference between a power of attorney and a conservatorship?

A conservatorship is often ordered when a person is already incapacitated. A power of attorney must be created before a person becomes incapacitated.  A power of attorney is much more limited in scope and is limited to financial assets.  With a conservatorship (unlike a power of attorney or health care directive) a conservatee may be compelled to see a medical provider, submit to certain treatment. Lastly, (unlike a power of attorney) a conservatorship would afford the conservator the ability to seek direction from the court as how to proceed in a particular situation thereby protecting the conservator and the conservatee.