Go for the best surgeon you can find. and DO shop around. i saw four surgeons. One said wait, two said RRP, one said DaVinci. I found the stalwart institutions like Sloan Kettering liked RRP and the younger guys liked Davinci.
i had Davinci, but found the whole thing was oversold. I have had two spinal surgeries and this one hurt far more than those. I can't imagine RRP would have been more painful. I was up the evening of surgery - that is common for every surgery - but uncomfortable for several days. Some docs and patients fare much better on the pain scale.
Both are fine. Both have similar side affects and there is NO rhyme or reason to why continence or ED is a problem or is not.
Don't let the style of surgery concern you too much. Go for a doc who has done hundreds and has happy patients.