Yes, both ways have pros and cons and actually almost the same just in reverse order. It all also depends of age, personal health issues, lifestyle and personal preferences.
Results greatly depend on the skill of surgeon or radiologist. The only advantage of prostatectomy is that after prostate is out of the body and completely examined one can get complete and correct picture about gleason and possible breach (as you can see from previous post).

I would also recommend Walsh's book, it is easy to understand and explains many things in detail.