I know almost nothing about Bowel Cancer although being a member of several forums I do know that they are largely populated by people whose treatment is ongoing or not produced the best results. You don't hear so much of the many people whose treatment has been very successful or at least given them a considerable increase in time they would not have had without treatment. I therefore feel a more representative idea of success/problems can be gained from consultants and by reading up on highly reliable and medically approved sources. I am not detracting from the many helpful and well informed opinion on this and other forums, just saying what you read may not be truly representative. It's the same on car forums in as much as if you read all the problems people have you can get the impression that all of the marque are highly troublesome and more than they generally are.
Reverting to cancer, men can react very differently to various treatments and sadly when it comes to PCa, at least a small number of men due to permanent incontinence and other side effects, may feel they would have been been in a better position had they not had a particular treatment. It's a bit of a gamble as to whether you will one for whom treatment works well or not and sometimes even with the detailed histology and scans of an individual, a consultant cannot reliably predict outcomes.
Hope whatever path you take works well for you.