@manojsmishra
The long range affects of removal of prostrate are propertly more than radiation. The new radiation treatments are really targeted and have great cure rates with side affects these days kept to minimu by most.

I had 30 rounds of proton radiation at UFHPTI. I got two opinions on treatments one from Mayo Jacksonville and second from UFHPTI. Radiation treatments have side affects that range from minor to serious. It affects individuals differently and what one will have anohter will not.

Mine were minor and easlity dealt with. I am now over a year from treatments and have no side affects remaining. So long term mine are gone. Could I have issues in future yes and so can surgery. I am not trying to talk you out of sugery if that is what you want but know that surgery is not minor and will have very serious side affects on your body and quite a recovery.

Research both, get second opinions on pros and cons and get additional tests like Decipher, PSMA, bone scans to determine you risk level and if the cancer is only in prostrate or has spread or risk of spreading.
Good luck!