Look here. You will see brachy is very curative. This is because since the radiation comes from inside thebprostate, it doesn’t pass through any organs, they can dose you up a bit higher…
*******
Here is a good website to compare odds of cure for the major treatment paths. You have to determine your stage, low risk, intermediate, or high risk (risk of recurrence). So if you are intermediate, pull up the intermediate chart and you can see the odds of 10-20 yr survival, etc. based on the treatment you pick.
https://www.prostatecancerfree.org/compare-prostate-cancer-treatments/
It is best viewed on computer or just print it on paper. Not so viewable on phone.

To make the graphs easier to read, i drew a dot on the endpoints of the elipses, and then drew a line through the dots. This turns the elipses into lines.

Also be aware the the graphs don’t show any salvage radiation benefit. This would boost the surgery odds up a bit.

And, this is a very dysfunctional industry from my view. Loads of bad info mixed in with the good info. Same with the docs. Many of them are more dangerous than the cancer.