Hi,
The side effects are similar, with surgery they are generally immediate but can and generally do improve, more so with urinary issues, ED is more hit and miss, depends on whether your nerves are spared.
The side effects with RT/Bracy tend develop over time
I went the RT/Bracy route mainly because I was T3b so most likely would have needed salvage HT too, plus I was told surgery would be none nerve sparing
Side effect wise I'm more affected by the 2 years hormone therapy which finishes in a couple of months. Its been very manageable (not the case for everyone), but I'll be glad to be off it! I will see what the future holds ED wise but so far things are still working, if less enthusiastically due to the HT.
All the best
John