No it is not. A robotic prostatectomy is better at treating the early stages of prostate cancer. Learn more at http://www.harleystreeturology.com/the_prostate/treatments/robotic_prostatectomy.php
Partial prostatectomy: Open surgery to remove part of the prostate gland, leaving the posterior portion intact. Partial prostatectomy is usually performed through an incision in the lower abdomen...
Radical removes the whole thing. Partial, removes enough to resolve whatever problems you are having, but leaving enough that you should be able to enjoy sex afterward.
A prostatectomy is the surgical removal of a man's prostate and the diseased seminal vesticles, if the cancer has spread outside of the prostate; otherwise only the full prostrate will be removed.
I don't yet know the answer, however I'm due to undergo a radical RP on May 22nd, 2008. My doctor say, emphatically, "No strenuous exercise until at least 3 months!", while the Urologist says 2...